Shywhale's Song

Whenever you cast a Whale spell, put a quest counter on Skywhale's Song.
Whenever a creature you control dies, you may remove X quest counters from Skywhale's Song, where X is that creatures converted mana cost. If you do, return it to your hand.
"The whales do not sing because they have an answer, they sing because they have a song.'
-Gregory Colbert