Life Stream Dragon

Flying
You have hexproof and gain 20 life. You
may pay {1}{w/u} to attach an aura from your hand
or graveyard to this card. This creature gains
lifelink when targeted by an instant. When this
card is destroyed and sent to the graveyard, you
may discard two dragon creature cards from your
hand to return it to the battlefield. You may also
discard enchantments or instants for this effect.