Ilgdun the Devourer

Devour 2 (As this enters the battlefield, you may sacrifice any number of creatures. This permanent
enters the battlefield with twice that many +1/+1
counters on it.)
Whenever a spell you cast would have another creature be destroyed or sacrificed, you may have Ilgdun the Devourer devour that creature instead.
(That creature is sacrificed and two +1/+1 counters
are placed on this permanent.)