Latias

Flash, flying, first strike, absorb 3, ward {3}.
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever Latias deals combat damage to a
player, you gain 1 life and draw a card for each
damage dealt this way.
Dash {u/r}{u/r}{u/r} (You may cast this spell for its dash
cost. If you do, it gains haste, and it's returned from
the battlefield to its owner's hand at the beginning
of the next end step.)