Predaplant Flytrap (INOV-EN006) [Invasion: Vengeance]

Once per turn: You can target 1 face-up monster your opponent controls; place 1 Predator Counter on it, and if it is Level 2 or higher, it becomes Level 1 as long as it has a Predator Counter. At the start of the Damage Step, when this card battles a monster with an equal or lower Level: You can destroy that monster, then increase this card's Level by the original Level of the destroyed monster.