Since I cant find a friendly wiz unidle atm ill post this here.

Theres a bug with invis. Currently, if you are invis and you walk into a room
with mobs that chain spells at the first to enter a room, the mobs wont attack
you but the spell still hits you, causing them to aggro. This is obviously a
bug (if they dont attack you, there is no way they should be able to target
you with a spell) and I hope someone can fix it.