Black tentacles question

[Rob80]

Hi,
i have few questions about black tentacles spell.

1) The description entry states:
"If the tentacles succeed in grappling a foe, that foe takes 1d6+4 points of damage and gains the grappled condition. Grappled opponents cannot move without first breaking the grapple. All other movement is prohibited unless the creature breaks the grapple first."
This sounds like even teleport effect are blocked. It that possible?

2) casting this spell breaks invisibility? It's similar to a summoning spell (I know it's a creation effect and not a summon one but it's still a conjuration spell) or it is considered a direct attack?

[Ipslore the Red]

1) No, but any casters would have to make a concentration check to use their teleportation spells.

2) I think it doesn't, since the tentacles have their own CMB and attack rolls.

[Jeraa]

Rob80 wrote:

2) casting this spell breaks invisibility? It's similar to a summoning spell (I know it's a creation effect and not a summon one but it's still a conjuration spell) or it is considered a direct attack?

Maybe.

Quote:

Of course, the subject is not magically silenced, and certain other conditions can render the recipient detectable (such as swimming in water or stepping in a puddle). If a check is required, a stationary invisible creature has a +40 bonus on its Stealth checks. This bonus is reduced to +20 if the creature is moving. The spell ends if the subject attacks any creature. For purposes of this spell, an attack includes any spell targeting a foe or whose area or effect includes a foe. Exactly who is a foe depends on the invisible character's perceptions.

If you conjure up the black tentacles so that an enemy is already inside the area, it counts as an attack and so breaks invisibility. If no enemies are within the area when you conjure it, then its not an attack and does not break invisibility.