WTF - Trial of Time (lvl4 Sekhema) - instant death in hardcore, bypassing ES and Mind Over Matter

Burning here a bit. Playing on hardcore, spent a week setting up a good build and items, was finishing trial of time in sekhema.

Fighting the last boss - it is easy, he is half HP. Boss disappears and apparently some fight mechanics are coming into play, where you need to touch or not touch things that are appearing. There are no hints, nothing.

Then boss re-appears and instantly kills me "TimeWastingMachineIII has committed suicide". Directly to 0 HP, with full 8000 Energy Shield, 1000 mana (mind over matter) and 7000 Honor. Welcome to softcore.

An interesting idea otherwise but terrible design for Hardcore, as it means you cannot survive unless you study the boss in advance. Which I don't do - because what fun is in it?

Dropping the game till leagues now, after dying 70+ lvl twice due to messed up mechanics (second time for a different reason but also bypassing mind over matter and energy shield)