Why "Har-Shebes" is taking ZERO DAMAGE???

[Cryomancer]

I an playing as demonologist but one boss in particular is unbeatable because by some unknown reason, he takes no damage. Tried everything but he takes no damage.

In this video at 23m, he apear to not be invincible. Why this? How i kill this boss?

https://www.youtube.com/watch?v=7CiaBmCVRcg

[NavFamG]

Easy fix, you're doing it wrong! haha

No really, the way you have to fight him is this; You hide over behind the rocks right by the water (to stay clear of his AoE attack) and watch the minions pass the floating ball around. When one on your side get's the ball, it grows big, you then run out and kill it and scoot back to the rocks and wait until another one on your side get's it and run out again. Repeat until half are dead and then Har's can be attacked. When he get's down to 25% he's invincible again and you run to the other side of the cave by the force field to hide and attack the other side of minions when they get big, once all are gone you can finish off Har.

Here's the blurb from the Wiki: The minions have to be killed before you can harm the boss. In order to kill the minions be on the lookout for glowing spheres to appear above them (they also get bigger). Always target the big one because otherwise not only they reappear but you become rooted for several seconds. Once you are done with half (four) the boss will start area attack spells with spikes coming out of the ground. At that point start harming the boss. Once he is around 20%-25% health you need to kill off the rest of the entourage (four more minions). When they are gone proceed to finish off the boss and claim the amulet piece.

p.s.: An easy way to pick off the minions is to hide behind the rock formations every time your health is low. The minions stay dead while you regen. This goes for the boss too. While you play hide and seek with the minions (2nd round) his health stays at that 20%-25%.