Daxos, enlightened Artificer

Whenever you cast your first artifact or
enchantment spell, look at each opponents
library. You may exile one face-down. As long it
is exiled, you may cast it and you may spend
mana as though it were mana of any color to
cast that spell.
Sacrifice an artifact or enchantment with
converted mana cost X: Redirect up to one target
of a spell with converted mana cost X.