Emperor of bones - Bug
When creatures are sacrificed at the beginning of the next end step as stated on emperor of bones, any triggered abilities of their death are not triggering. The creatures do have a finality counter on them. Which would exile the creature if it were to be put into a grave yard. But the creature wasn’t exiled. It was sacrificed as stated by the card. Even if the creature dies in combat the ability should still trigger because the creature died. Then is exiled before entering the graveyard due to finality counter.
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Rezzahan#77802
commented
You are misunderstanding the finality counter. Any permanent with a finality counter on it does NOT die, regardless of reason, it gets exiled INSTEAD.
122.1h One or more finality counters on a permanent create a single replacement effect that stops
the permanent from going to the graveyard. That effect is “If this permanent would be put into a
graveyard from the battlefield, exile it instead.”