Lyrona, Cryomage

+2: Tap target creature. Until your next turn, when that permanent becomes the target of a spell or ability, its controller sacrifices it.
-1: Target tapped permanent doesn't untap during its controller's untap step as long as you control Lyrona, Cryomage.
-8: You get an emblem with "At the beginning of your end step, each opponent sacrifices two tapped permanents."