La'Vahn, Undead Shepherd

When you cast La'Vahn, each player
sacrfices a creature. Create a */* red human
creature token with power and toughness
equal to the total power and toughness of
creatures sacrificed this way.
When La'Vahn enters the battlefield, exile
all creatures from graveyards. Create a */*
black minion creature token with power and
toughness equal to the number of creatures
exiled this way.