Snapping Sailback
Most Enrage dinosaurs sit on the battlefield daring you to point removal at them, and that is the trap they are built around: hit them and they grow. The wrinkle here is Flash, which moves that whole interaction off your turn and onto the stack. The trade most decks try to make against a 4/4 is a profitable block, and this one punishes it twice over: you can hold up five mana, drop the body in response to an attack or as a surprise blocker, and then collect a +1/+1 counter from the very combat damage meant to kill it. The Enrage clause only pays out if the creature survives, so the math is about toughness lines: a 4/4 that eats three damage walks away a 5/5, and anything that pings it without finishing it is feeding it. Pairing instant-speed deployment with a reward for being damaged is the real design idea, because the two abilities cover each other's weakness. A vanilla Enrage creature is too slow and too telegraphed; a flash creature with no payoff is just an ambush. Stapling them together makes the card both a combat trick and a board presence, and forces the opponent to decide whether attacking into open green mana is worth the counter they might be handing over.
