Katelyn, Orzhov Spirit Keeper

Whenever another nontoken creature you don't
control dies, create a 1/1 white and black Spirit
creature token with flying.
{t}, Sacrifice a creature: You gain 3 life.
{w}{w}{b}{b}, Sacrifice X creatures: Each opponent
loses X life, you gain life equal to the life lost in
this way.
"Kneel."