When you Normal Summon a monster, if your opponent controls more monsters than you do: Destroy your opponent's monsters so that your opponent controls the same number of monsters as you (your opponent chooses which of their monsters are destroyed).
Able to destroy up to 2 of your opponent's monsters.
Effect can only be activated when you normal summon.
Your opponent gets to choose which monster he will destroy which may end up in their favor.
This card can even the plain field if you end up at a disadvantage when your opponent was able to summon more monsters than you. Use cards that lets you special summon some monsters to gain the advantage or use Soul Exchange to essentially take all of their monsters.