Shaman of the Constellations

{2}{g}, discard a noncreature card, {t}: Search your library for a creature card with converted mana cost 3 or less and put it onto the battlefield. Shuffle your library afterward.
{4}{g}, sacrifice any number of creatures, {t}: Search your library for a creature card with converted mana cost X or less where X is the combined converted mana cost of creatures sacrificed to activate this ability.