
Claxon |

Since it's supposed to function like a ranged unarmed strike I would say that it requires line of sight. If you don't have line of sight the enemy would have concealment against you and you can't punch at what you can't see.
Also Quivering Palm needs line of sight too, at least for the initial attack (because it requires a normal melee attack which deals damage to deliver the Quivering Palm attack). After that, within a number of days equal to the monks level he can will the creature to die, which does not require line of sight.

Trung Bui |

Since it's supposed to function like a ranged unarmed strike I would say that it requires line of sight. If you don't have line of sight the enemy would have concealment against you and you can't punch at what you can't see.
Also Quivering Palm needs line of sight too, at least for the initial attack (because it requires a normal melee attack which deals damage to deliver the Quivering Palm attack). After that, within a number of days equal to the monks level he can will the creature to die, which does not require line of sight.
My friend is arguing that you don't need Line of Sight to hit the opponent. You just need to "think" of where they are and it works.

Claxon |

No, thats not how it works at all. Quivering Palm functions that way after you have landed a melee attack on them which dealt damage and which you declared as your one Quivering Palm attempt per day.
Almost all spells need line of sight to affect someone, with the exception of area of effects spell (such as fireball and someone around a corner) because you must be able to target them. You cannot target something that has total concealment.
Targeted ranged attacks (which includes Blood Crow Strike) require line of sight, without question.

Kazaan |
Blood Crow Strike "marks" a target and it states that you treat the target creature "as if threatened" with no specific qualifier. It does, however, state that the energy crows "fly from your fists to the target" so I'd argue that you only need line of effect once the target has been marked. However, also keep in mind that is an instantaneous duration spell with a 1 round casting time. So you spend a full-round action casting it on Turn 1, then it completes "just before" your Turn 2 and then, during your Turn 2, you can make an Attack action or a Full-Attack and your Unarmed Strikes can hit the target no matter where it has gone to, but then the effect is over and the target would need to be marked again if you want to repeat it.

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"Your unarmed strikes release blasts of energy in the form of bolts of fire or glowing red crows, which fly instantaneously to strike your target. You can make unarmed strike or flurry of blows attacks against the target as if it were in your threatened area; each successful attack deals damage as if you had hit it with your unarmed strike, except half the damage is fire and half is negative energy (this negative energy does not heal undead). For example, if you are a 14th-level monk, you can use a flurry of blows to attack five times, creating one energy crow for each successful attack against the target, and dealing 2d6 points of damage (plus appropriate unarmed strike modifiers) with each crow."
http://paizo.com/pathfinderRPG/prd/ultimateMagic/spells/bloodCrowStrike.htm l
If there was a giant pillar in your way, and you had a reach weapon, and they were still within range, would it hit the target? Not likely due to two accounts: They would either be considered to have partial or full-cover, or it would be considered a "hard corner" sort of thing where you basically just could not hit them with that attack. From the looks of it, Line of Sight would be required. It's not the greatest spell in the game for sure, and honestly without Quicken Spell-like Ability it's pretty worthless. To top it off, fire and negative are two VERY common energy types to be resisted after a certain amount of progression through the campaign.
Kazaan, could you provide a link to that description you are stating? I don't see where it says "marks a target".
I'd recommend not taking that ability.
Trung, in regards to your OP, any melee requires line of sight to use. Typically you aren't meleeing within the 5ft range or further with a giant pillar in the way are you? Sounds kind of silly. Quivering Palm is the same as any other melee attack, it has to connect for it to work(even though the opposing creature will probably fort save).
Correct me with links if I'm wrong.

Kazaan |
Kazaan, could you provide a link to that description you are stating? I don't see where it says "marks a target".
It's cast on a target creature and your unarmed attacks can be used on said creature... it's marking the creature to be targeted by unarmed attacks as if you threatened them.
"Your unarmed strikes release blasts of energy in the form of bolts of fire or glowing red crows, which fly instantaneously to strike your target. You can make unarmed strike or flurry of blows attacks against the target as if it were in your threatened area; each successful attack deals damage as if you had hit it with your unarmed strike, except half the damage is fire and half is negative energy (this negative energy does not heal undead). For example, if you are a 14th-level monk, you can use a flurry of blows to attack five times, creating one energy crow for each successful attack against the target, and dealing 2d6 points of damage (plus appropriate unarmed strike modifiers) with each crow."
In your example of a pillar between you and your target, you do not threaten their square with a reach weapon because you cannot make a melee attack into it on account of the solid intervening obstacle. Blood Crow Strike bypasses this limitation because it's explicitly designating the creature as "threatened"; that means that you are able to target it with an attack. Therefore, regardless of what might be in the way, you start with the presumption that you're able to target the marked creature; you throw a punch and they suddenly go "OW!"

Avianfoo |

Blood Crow Strike is a spell with a single target.
Some spells have a target or targets. You cast these spells on creatures or objects, as defined by the spell itself. You must be able to see or touch the target, and you must specifically choose that target. You do not have to select your target until you finish casting the spell.
So at the beginning of your turn you need to actually see the target of the blood crow strike to make it happen (Much like magic missile). Then a flurry of blows flies off and smacks the target.

Kazaan |
Yeah I see "as if it were in your threatened area" but there is literally NO mention of "Marking". That's your own definition/rule and that doesn't apply if it doesn't exist. Sorry dude.
Without pure clear LOS, it's treated as non-attackable, or with some level of concealment/cover.
You do realize the difference between specific, mechanical terms and generic, descriptive terms, right? 'Marked' isn't a mechanical term; it's a description of the mechanical process of casting a spell on a target with the resulting effect being "they are treated as if in your threatened area". You're not being clever or observant or analytic... you're being 'pedantic'. If you want it presented in clear, mechanical terms, it will end up being a longer explanation... try to keep up because I have no intention of repeating myself:
School evocation [fire]; Level cleric 4
Components V, S
Casting Time 1 round
Range medium (100 ft. + 10 ft./level)
Target one creature
Duration instantaneous
Saving Throw none; Spell Resistance yes
Your unarmed strikes release blasts of energy in the form of bolts of fire or glowing red crows, which fly instantaneously to strike your target. You can make unarmed strike or flurry of blows attacks against the target as if it were in your threatened area; each successful attack deals damage as if you had hit it with your unarmed strike, except half the damage is fire and half is negative energy (this negative energy does not heal undead). For example, if you are a 14th-level monk, you can use a flurry of blows to attack five times, creating one energy crow for each successful attack against the target, and dealing 2d6 points of damage (plus appropriate unarmed strike modifiers) with each crow.
First and foremost, the casting time is 1 round. That means that you spend a full-round action to begin casting in Round 1, and then must maintain it until your turn comes around again in Round 2. Immediately before your turn on Round 2, the spell completes and the result comes into effect. The creature you cast the spell against, henceforth referred to as the target has been affected by the Blood Crow Strike spell. You must have LoS and LoE to the Target upon completion of the spell, though you don't necessarily have to designate a target until completion; so you could start casting the spell even with no valid target and, if a target presents itself upon completion, you can designate them at the start of your "completion" turn. Next you can make unarmed strike or flurry of blows attacks against the target as if it were in your threatened area. So, first and foremost, the target is considered to be in your threatened area. Being in your threatened area means you can make attacks against them. It gives no restrictions of line of sight or effect. If you had a longspear and the set up is [XOT] where X is you, O is a wall or other solid blocking obstacle, and T is a target you'd like to attack, T is not in a square that you threaten; therefore you cannot make attacks with the longspear against them. BCS, on the other hand, establishes right from the start that the target of the spell is treated as if they were threatened. Period. This means there is a presumption of targetability on the Target; you can make an Unarmed Strike and it will affect them, rolling Attack vs AC as normal. Fluff-wise, you can say that the crows automatically fly out like seeking missiles or whatever, but the result of the spell is to cause the Target to be threatened by your Unarmed Strikes and threatened means you can attack them; therefore, you can attack them without qualification regarding line of sight or line of effect once the spell has completed casting; you could move and place a solid obstacle between you and the target and make an Attack action to deliver an Unarmed Strike and it will still affect the target. They could have readied a spell to create a stone pillar between themselves and an attacker and your Unarmed Strikes would still hit them. Lastly, it is an instantaneous duration so, once it completes casting, you have only your active turn to take advantage of the benefit of the spell; if, for whatever reason, you do not make Unarmed Strikes (ie. you are affected by a spell that prohibits appropriate actions, you are compelled to make a Withdraw action, you delay your turn, etc), then the spell is squandered. This is the most logical and analytic reading and analysis of the spell. Period. End of discussion.
To put it in simple, layman's terms... the target is "marked" to receive Unarmed Strikes from you on your turn immediately following the completion of the spell.

Claxon |

Kazaan, it seems clear that you want this to work despite anyone's opinions to the contray.
LOE and LOS are required to successfully cast the spell on someone. I agree that you could start casting without a valid target and hope that someone moves to where they become a valid tagret. Since it requires a full round cast time you would start casting and right before your next turn the spell completes and you choose a target at that moment. This is important because if you're a 7th level cleric who just got this spell and started casting and want to select a target that is 160ft away that would be a legal target, but if that target moves out of range on their turn moving to be 180ft from you then the spell would not be able to successfully be cast on them, similarly the spell cannot be cast on someone with total concealment against you either becasue they cannot be selected as a valid target.
You must have LOS/LOE to your spell target at the moment the spell is complete and if you do, by the virtue of the way the spell works you will have LOS/LOE for the ranged unarmed strikes.
Forget this non-sense of being threatened means that this spell is someone how a heat seeking missle, it doesn't work that way. Magic missle is basically a heat seeking missle that never misses, but you still can't select someone as a target who has total cover relative to you.

Caedwyr |
Reading the spell text, does casting the spell once allow you to use unarmed strikes/flurry of blows against the target at any time? Does it allow you to do it at any range? How does targeting work for ongoing effects resulting from a spell that has already been cast but doesn't say anything about range limits during the ongoing effect (like other spells or effects)?
If the answer is no, please provide the reasoning using the rules.

Claxon |

Claxon wrote:Kazaan, it seems clear that you want this to work despite anyone's opinions to the contray.Fail. Try reading next time instead of just skimming.
Perhaps I misunderstood your statements, I redact my statement of "it seems clear". However, do not assume that I skimmed it just because I missread a few points. Upon reading your statement again I now undersatnd your position correctly I believe.
Although, I will admit I found it weird because your earlier posts were in agreement with mine, but I thought you had changed you opinion. Mostly because I misread your example about the spear and wall and threatening to the point where I thought you were implying that the "threatened" clause of the spell somehow let you ignore cover.
I apologize.
Reading the spell text, does casting the spell once allow you to use unarmed strikes/flurry of blows against the target at any time? Does it allow you to do it at any range? How does targeting work for ongoing effects resulting from a spell that has already been cast but doesn't say anything about range limits during the ongoing effect (like other spells or effects)?
If the answer is no, please provide the reasoning using the rules.
Upon your initiative count you begin to cast the spell and you can select the target immeadiately or wait (selecting immeadiately is actually a bad idea since it has a long casting time). As the spell is complete (right before your iniative count on the next turn) you can select your target (which most be within the spells range and you must have LOS/LOE to). On your next turn, which occurs immeadiately after this selection, you must use the power of the spell to perform the unarmed strike or flurry of blows or lose the power because the spell has a duration of instanteous. If the target was a valid tagret (i.e. within range and within LOE/LOS) then their position will not have changed from the completion of the spell to attacking them with your now ranged unarmed strikes. As to your final question, can you provide an example of spell that does such a thing? The nearest thing I can think of is flaming sphere, but that has a defined range that the sphere can go to and the rules for moving it are stated.