Poxwalker

Poxwalker can't block.
Whenever Poxwalker attacks, target creature gets
-1/-1 until end of turn.
Whenever a creature an opponent controls dies,
create a 1/2 black Poxwalker creature token that
can't block.
Unholy diseases warp and mutate, sending their
carriers into a froth-jawed killing fever to the
ruin of all.