Winged Coatl

The body is a 1/1, but the keyword stack is what turns it into a problem for anyone attacking into open mana. Flash plus flying plus deathtouch is a compact ambush package: hold up three mana, wait for a flier or a fat ground creature to commit to combat, and drop a blocker that trades up against almost anything. Deathtouch makes the 1/1 a one-for-one against the biggest thing on the board; flying lets it eat evasive threats most green-blue decks struggle to interact with; flash means the attacker never gets to play around it the way they would a creature already on the table. The cost of all that flexibility sits in the toughness: cast it main phase and it dies to a stiff breeze, and a single noncombat removal spell wipes out three mana of investment. So the card asks to be held, not deployed, an unusual posture for a small green creature. Most of green's deathtouch bodies want to stand on the ground and block; pairing the keyword with flying and flash instead pushes it toward the reactive, instant-speed role blue usually fills, and that split lineage is what earns it both colors. It reads as filler until an attacker miscounts the open mana, at which point a three-mana snake erases a finisher.