Novice Sorceror

Invoke (When you cast this spell, you may exile
an instant or sorcery card from your hand.)
{t}: Evoke (You may cast the exiled card by paying {x}, where {x} is the exiled cards mana
value minus this cards mana value.)
—
"What can I do with this power" Asked the
young wizard.
"Anything you desire", Kasmina replied.