Unwavering Crusade (Summon Elemental Relic) + Blood Magic costs life each time it triggers

The skill according to ingame tooltip and the poewiki has no mana cost associated besides the relics activating their Aura, that should not cost myself mana (or life in this case with Blood Magic) to my knowledge.

Here is a video that showcases it https://streamable.com/3mfblc

Edit: I just looked at the clip again and there are multiple moments where the life goes down exactly when it triggers... like at 0:07 after I flame dash it triggers top left I go from 760hp to 1hp and it triggers exactly at that point.

Or 0:10 after immortal call triggers and I run downwards then I am at 1868hp, the elementals triggers and I go to 974hp when it triggers

Okay it's not a bug Rathpith also says triggers... my own fault