Vodalian Bogskimmers

Abjure {2}(You may have an opponent cast target
noncreature, nonartifact spell in their graveyard with
a converted mana cost 2 or greater for {0}, then exile it
to reduce this creature's mana cost by {w/b}.)
Islandwalk, Swampwalk
{u}{u}, {t}: Exile target noncreature, nonartifact
spell in your graveyard with a converted mana
cost 3 or more to add {w/b}{w/b}.