Kirby, the All Devouring

As an additional cost cast this spell, discard any number of cards from your hand, this spell costs {1} less to cast for each card discarded this way.

{2}: Return all cards exiled by Kirby to their owner's graveyards, exile target creature card from a graveyard.

Kirby gets +X/+Y, where X is the exiled creature's power, and Y is it's toughness.

Kirby has all activated abilities of the card exiled by this creature.