Canal Dredger

{t}: Put target card from your graveyard on the
bottom of your library.
Sacrifice Canal Dredger: each play exiles the
bottom card of their library. You may cast one
card from among them as long as it remains
exiled. You may spend mana as though it were
mana of any color to cast that spell.
"The first recycled waste but wrecked curiosities. Now
they excavate with care to recover some archeological
specimens intact. They're best when deployed in
teams." - Muzzio, Visionary Archit