Elminster, God of Wizards

Elminster, God of Wizards has Indestructible
as long as you have 5 or more instant
or sorcery cards in exile.
{u}{u}{u}{u}: Target creature loses all abilities and becomes a 1/1 frog creature until end of turn.
When Elminster, God of Wizards attacks you
may cast an instant or sorcery card from your
hand without paying its mana cost.