1. Can I play this card on other player's combat checks?
Yes. It lacks any prohibition on location or "other-ness" of which character. So you can play it on your own combat check to defeat a monster or another player's regardless of location. It will count at your 1 item for the check. Note that if the villain has 2 combat checks to defeat, you can only play the Wand of Enervation on one of them, since it works on a combat check.
2. I have ran into multiple cards with the same wording, how do I know if I can play this on other players? (ie: I cannot play Invisibility on others and it reads "Discard this card to evade a monster")
You can play a card anytime the card allows it.
Playing Cards
Anyone can play a card whenever the card allows it.
So basically, if the situation you are in matches the conditions of the card, you can play it. That usually means checking for "a check" vs. "your check", "a character" vs. "another character", and "at your location" vs. "at another location" vs no limit on location at all.
Try this guide out. But the short version is, if it doesn't prohibit you from doing it, you can do it, with the overarching rule that you can't evade or succeed at something for another character.
I like to make the powers "explicit" in my head. The person playing hte card is the one performing the action granted by playing the card. So:
Invisibility: Discard this card to evade a monster.
Invisibility: You discard this card to allow you to evade a monster.
That won't work on another character because you have to do the evading.
Blessing of the Gods: Discard this cards to add 1 die to a check.
Blessing of the Gods: You discard this card to allow you to add 1 die to a check.
That works for you or anyone else. There is no limit on location either. And there is no rule against you adding dice to other people's check.
Crown of Charisma: Recharge this card to succeed at a Diplomacy check.
Crown of Charisma: You recharge this card to allow you to succeed at a Diplomacy check.
That only works for your own diplomacy check, not others, because you can't succeed at something for another character.
Sanctuary: Discard this card to choose a character at your location to evade a monster; put that monster on top of the location deck, if it came from one.
Sanctuary: You discard this card to allow you to choose a character at your location to evade a monster; put that monster on top of the location deck, if it came from one.
This you can play on others. The action you are performing is choosing. It is worded so that the target is the one doing the evading. You can play it on yourself because you yourself are a character at your location.
Shortbow: For your combat check, reveal this card to roll your Dexterity or Ranged die +1d6.
Shortbow: For your combat check, you reveal this card to allow you to roll your Dexterity or Ranged die + 1d6.
This only works for you, because it only works on your combat check.
Shortbow: If you are proficient with weapons, you may discard this card to add 1d4 to a combat check at another location.
Shortbow: If you are proficient with weapons, you may discard this card to allow you to add 1d4 to a combat check at another location.
This you can play to help another character at another location. It can't help yourself because you can't be at another location from yourself. And it can't help someone at your location because it says another location.
Allying Dart +1: You may recharge this card to add 1d4+1 to a combat check made by another character at your location.
Allying Dart +1: You may recharge this card to allow you to add 1d4+1 to a combat check made by another character at your location.
You can play this to help another character, but not yourself since it says another character. That character has to be at your location since the card says so.
Thieves' Tools: Reveal this card to add 1 die to your Disable check.
Thieves' Tools: You reveal this card to allow you to add 1 die to your Disable check.
This only helps yourself since it has to be your Disable check.
Thieves' Tools: Discard this card to defeat a barrier whose highest difficulty to defeat is 11 or lower.
Thieves' Tools: You discard this card to allow you to defeat a barrier whose highest difficulty to defeat is 11 or lower.
This only helps yourself, since you can't defeat a barrier for another character.
There are more examples in that guide.
We also ran into Iesha Foxglove the other day which brought up questions about Monsters which do not have the combat check to defeat. We looked this up and it stated that if you fail her check, you take damage. We were wondering if this is the same for Monsters such as the Siren. The card reads
Wisdom 8 check to defeat
"If undefeated, examine the top 3 cards of your deck and discard any allies. Shuffle any remaining cards into your deck."
Before Iesha, we would play this were we did not take damage. The "If undefeated" would be the only penalties.
If you fail a check to defeat a monster, you take damage. Regardless of what kind of check it was.
From the "Attempting a Check" sequence:
Take Damage, If Necessary. If you fail a check to defeat a monster, it deals an amount of damage to you equal to the difference between the difficulty to defeat the monster and your check result. Unless the card specifies otherwise, this damage is Combat damage. For example, if the difficulty to defeat a monster is 10 and the result of your check is 8, the monster deals 2 Combat damage to you (see Taking Damage, below). Remember that players may not play more than 1 of each card type during a check, so if you previously played a spell to affect the check, you may not play a spell to reduce damage.
So even failing a Wisdom check to defeat a monster results in damage. (And Iesha is a monster as well as a villain). Unless the card says other wise, the damage is combat damage. The Siren says it is mental damage instead of combat damage. Iesha doesn't change the type of damage, so failing the Charisma, Diplomacy or Divine check results in combat damage.
I see many posts talking about an errata. I cannot seem to find this for any deck. Does someone have a link or can tell me where this is located. It may resolve some of my questions about gameplay. I generally use the FAQ and other posts but a complete list of changes would help.
The FAQ is the complete and official list, but if you want something organized differently there are some on BGG. Though I'm struggling to find an up to date one. I'll get back to you because I was pretty sure I saw one recently.
I made these. Which if you sleeve your cards will correct all the powers where there has been an errata.
EDIT: So I looked through every errata thing on BGG and none of them appear to be completely up to date. If I missed it I'm sure someone will happily post a link for you. But like I said, the FAQ is the source of all those things anyway, so if you have the FAQ, you have the errata.
You need to clear out all the remaining cards.
The only two way to earn the opportunity to attempt to close a location are defeating the henchman and having no cards in the location. The henchman says "immediately" so you can't even do anything else first. And if you fail to close it, you still banish the henchman because you defeated it. So now there are 3 cards but no more henchman to grant you the chance to attempt to close the location, so you have to remove the last 3 cards in order to get the opportunity to attempt to close it again.
If you can’t close the location when the henchman pops up, you’ll have to burn through the whole deck to try again.
And note that summoned henchman (like Goblin Raid) do NOT let you attempt to close a location because they aren't part of a location.
If the summoned card is a villain or henchman, defeating it does not allow you to close a location or win the scenario—ignore any such text on those cards. Summoned cards are not part of any location deck.
Thank you Hawkmoon.
You are welcome. Good luck on your adventure.