Portal Novice

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 {u}.)
Portal Novice enters the battlefield tapped.
When Portal Novice enters the battlefield, put
target white, blue or black creature that is tapped
on top of its owner's library.