Magnusfire Wyvern

Flying
Whenever you cast a instant or sorcery, put a charge counter on Magnusfire Wyvern.
Magnusfire Wyvern's power is equal to the number
of charge counters on it.
{p/u}{p/u}: Reveal the top card of your library. If that
card is an instant or sorcery, you may put it into
your hand.