Fang, Unchained Warrior

Haste
Whenever Fang attacks, reveal the top X cards of
your library where X is Fangs power. You may
cast one equipment or enchantment spell from
the cards revealed without
paying its mana cost.
If you cast a noncreature spell with
mana value 5 or greater, Fang gains
Indestructible until the end of the turn.