Questions about Trap and Poison.

[Sangyn]

Hi, i was looking at "Expansive Trap Ability" feat and i don't understand if it's the effect of the trap that is 4 squares or if it's only the trigger.

If i put a trap (any) and i have an alchemist or something in my group, can he put poison on it? like without paying a cost other than the poison.

The ranger trap : pit trap
I need a scroll of create pit even if i want to do it mechanicaly ? if i do it mechanicaly i only need a full round action to set it ?

Thanks.

[Kalridian]

Concerning the feat:
"When the trap is activated, the effect is centered on whichever square the triggering creature first entered. If more than one square is entered simultaneously, choose at random."
So the trigger is expanded to 4 sqares, but the trap itself only affects the square that is entered first, after which the trap is triggered.

Concerning poison:
I don't think there are any rules for this, ask your GM.

Concerning the component:
I can not find any clarification on this, especially since it is in conflict with
"The ranger only needs simple materials to create the trap, such as a piece of cloth, a small amount of metal (such as a dagger, iron spike, or a few nails), a foot of rope or vine, and so on."

I would assume the scroll is only needed for the magical version, since EX abilities are not magical and I don't see any reason why one would need a magical component.

The question how in the world the ranger non-magically digs a 5 foot deep pit in just one round is best saved for another day...

[Sangyn]

Ok, thx for your aswers it's very helpful.