Bloodchief Ascension

Bloodchief Ascension's first ability has an "intervening 'if' clause." It won't trigger at all unless an opponent has already lost 2 or more life by the time the end step begins.

Bloodchief Ascension's first ability checks how much life was lost by each opponent over the course of the entire turn, even if Bloodchief Ascension wasn't on the battlefield the whole time.

Bloodchief Ascension's first ability checks only whether life was lost. It doesn't care whether life was also gained. For example, if an opponent lost 4 life and gained 6 life during the turn, that player will have a higher life total than they started the turn with — but Bloodchief Ascension's first ability will still trigger.