Karoly, the Reformer

Eminence —As long as Karoly, the Reformer is in
the command zone or on the battlefield, if an
effect you own would exile a card you don't own,
put a jail counter on it as it gets exiled.
You may cast exiled cards with jail counters on
them and you may spend mana as though it were
mana of any type to cast those spells.

"A second chance is sometimes all they need"