it doesnt require you to keep track of what other players are doing, and it doesnt make others feel restricted
What attacks does Amaura have
It's not possible to cause a creature to die under your control during the end step in time to have the ability trigger.
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Meanwhile, on the less monstrous side of things, the more human-focused forces of Innistrad might have the ability keyword Coven, which can cause a unique ability if you control three or more creatures with different powers when its triggered
Your creatures are going to be sacrificed left and right so youll have lots of opportunities to do this. Shes a survivor, too: at any time, you can sacrifice a creature and pay one mana to make her indestructible until the end of the turn, like shes using its corpse as a shield