Right, so done the move 3 times, whenever they failed their save they dissapeared like hit by void strike IV, awesome!
But when they saved they get frozen for a while, come back without taking the 1000 damage and are instead invulnerable to all damage.
Be careful when you use it, hoping this gets put into known issues soon.
Misspelled the thread name but guess I'll have to live with it v.v