Milenda Sorcerer

Instant and Sorcery spells you own that are not
on the battlefield have conceal. The conceal cost
is equal to its mana cost. (When you cast a spell
with conceal, instead of putting it into your graveyard
you may pay its conceal cost and exile it. If you do,
return it to your hand at the beginning of the next
end step.)
Wizards on Milenda do not only learn how to
reanimate the dead. They know how to regain
lost power.