Delepia, Cruel Scientist

Flying, Deathtouch, Islandwalk, Hybridized
Whenever you sacrifice a creature,
draw a card. You may reveal this card
as you draw it. If you do, return a creature
of the same converted mana cost from
your graveyard to your hand.
{2}{u}:Search your library for an instant
or sorcery spell and put it into your hand.
If you control a permanent with the same
converted mana cost, you may cast it
without paying it's mana cost. Shuffle your
library.