Kilastar Hatchling

{b}{g}, Sacrifice Kilastar Hatchling: Put a 3/3 black and green Dragon creature token with flying and " {b}{g}: This creature gets +2/+2 and gains decay until end of turn. Activate this ability only once each turn." onto the battlefield.
Kilastar hatchlings are notorious for being fearless, often defending their nest against much larger predators.