Reya, Ardent Spellslinger

When Reya attacks, you may put a Stun counter
on her and discard a card. If you do, she deals X
damage to any target, where X is the mana value
of the discarded card.
Whenever a Stun counter is removed from Reya,
you may draw a card.
Discard your hand: Put a Stun counter on Reya.
She gains Flying and Ward {3} and becomes a
Dragon in addition to her other types until end
of turn.