Mystifying Fiddler

Rehearse (At the beginning of your upkeep, put a
verse counter on this permanent.)
At the beginning of your upkeep, you may exile
target nonland card from a graveyard for each rehearse counter on Mystifying Fiddler.
As long as you control Mystifying Fiddler, you
may cast cards exiled with Mystifying Fiddler,
and you may spend mana as though it were mana
of any type to cast those spells.