Anastasia, The Spirit Stitcher

Stitch - {b}{g}{w}, {t}, sacrifice X creatures:
Create a Y/Z spirit token, where Y/Z is the
total power and toughness of the sacrificed
creatures. It gains +X/+X. You gain X life.
Stabilise - At the beginning of you upkeep,
the player who controls the most creatures
must sacrifice one, and the player who has
the least may return one from their graveyard
to play, and gain life equal to its power.