A number of Possessor assume form bugs

[Hellcommander]

Here are some bugs I've found with possessor's assume form talent:
Assuming the form of a void elemental does not allow you to breath in the void (you can still walk on the void tile but it quickly empties the characters air supply).

[Hellcommander]

Same issue happens with the mana worm when after walking onto a space/void tile it drops to 66 air and a turn later 22 air (costing ~44 air lost per tile as if the character was stuck in a sandworm tunnel wall)

[ScarletDragon]

Similarly when possessing a xaren it doesn't allow you to breath while going through walls.

[ster]

have you considered that maybe this is because permanent wall walking is completely and utterly overpowered rather than a bug?

[ScarletDragon]

I wouldn't say too overpowered, turns out xarens can only walk through specific types of wall, but I can see where that instance would be considered as such. I only mentioned it because it was similar in nature to the op's examples.