Thalanil, Simic Exile

{g/u}{g/u}{t}: Search your library for a creature card that
does not share a creature type with any you control.
Place it on the top of your library.
Creature spells cost {1} less for every unique creature
you control. (It is unique if it does not share a type
with any others.)
"My self imposed exile in the Rubblebelt has shown me
so much. There's such a breadth of utterly unique life
out here. Life that deserves a chance."