Arkarium: yet another (tough?) battle

I think you need MG and Onyx Will active for it to kick in. If not, all your buffs on at once. I seen myself getting 1 HP dmg quite a few times.

I don't experience this with level 1 Onyx Will.

EDIT: Evans have "i-frames" now. The 1 HP damage occurs when you're telecasting/teleporting. I've tested it without MG and it works.