Mastodonsaurus

Transmute {1}{b}{b}({1}{b}{b},Discard this card: Search your library for a card with the same converted mana cost as this card, reveal it, and put it into your hand. Then shuffle your library. Transmute only as a sorcery.)
Mastodonsaurus may have been completely unable to leave the water, as large quantities of bones have been found that suggest individuals died en masse when pools dried up during times of drought. It inhabited swampy pools and lived mainly on fish.