Select an enemy Monster or Cultist in the Battle. That Unit is Eliminated, and the owner receives Power equal to the Unit's cost.
Any: Use this to snipe your opponents toughest creatures. Use on a dark young to reduce Shub's combat, same works on Formless Spawn and every one of them will loose a combat dice. Take out a Star Spawn to ensure your kill results get through.
Keep in mind what your opponent can do with the power, as a surge of 3 power for your enemy could be worse than just fighting a tough monster.