Bone Pile

{1}{b} Sacrifice a Bone Pile you control and create
one black 1/1 skeleton token under your control.
{2}{b} Sacrifice two Bone Piles you control and
create one black 2/1 skeleton rogue or one black
1/2 skeleton soldier under your control.
3{b} Sacrifice three Bone Piles or one Skeleton
rogue or skeleton soldier and create one black 1/4
Bone Wall token with Defender.