Shinneli, Skull Collector

Lifelink, extort (Whenever you cast a spell, you may
pay {w/b}. If you do, each opponent loses 1 life and you
gain that much life.)
Whenever you gain life, create a 1/1 black and
white Spirit creature token with flying.
When Shinneli, Skull Collector dies, you may sacrifice 2 Spirits. If you do, return Shinneli to
the battlefield transformed.