Arcanis, Universal Master

Whenever a spell or ability you control with
mana value 5 or greater resolves, you may flip a
card from your hand onto the battlefield from a
height of at least one foot. If it lands face up, it
takes affect as though you had cast it.
Otherwise, put it into your hand.
{t}: Set aside your hand and draw seven cards.
During your end step, discard your hand and put
all cards set aside this way into your hand.