Megapede

Whenever Megapede kills a creature, instead of placing it in a players graveyard, attach it to
Megapede. If Megapede is killed, return all
attached creatures to their respective graveyards,
and the next Wurm you play gains +X/+X,
where X is equal to the amount of cards
attached to Megapede when it died.
"Swallower of men, the Megapede knows no
limits to its hunger."