Dina, Soul Steeper 
Legendary Creature — Dryad Druid
Whenever you gain life, each opponent loses 1 life.
, Sacrifice another creature: Dina gets +X/+0 until end of turn, where X is the sacrificed creature's power.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL