Marauding Raptor
Oracle Text
Creature spells you cast cost
less to cast.Whenever another creature enters the battlefield under your control, Marauding Raptor deals 2 damage to it. If a Dinosaur is dealt damage this way, Marauding Raptor gets +2/+0 until end of turn.
Step 2: Play Polyraptor while you have a Fling in your hand
Step 3: Launch an arbitrarily large Marauding Raptor at your opponent's face