Atziri reflect???????

Getting 1 tapped by my own elec/ice attack against Atziri and this is reflecting back to me??? Is this a mechanic of this boss that I've NEVER seen before or a flat out bug????

literally 1 shot when Atziri does not attack, and I get 1 tapped to oblivion!? Thank god im too high level to care about wasted XP anymore

Nevermind. Had to look it up. I could only attack 1 of the 4 to do dmg or i'd get 1 shot. Then when combined for some reason I could only attack 2 times then heal? NOt sure what the heck this mechanic is with literally no defences at LVL 95!??!