yugioh duel power card list price Single Ultra Rare Card of Demise DUPO-EN050 may be 1st or Unlimited Edition TCG] Duel Power Complete List

If youre opponents names Danny Friedman, Tsunamis are the way to go

if both monsters are still face-up on the field, negate their effects, then if both their effects were negated by this effect, as long as those monsters are in face-up Attack Position, they cannot be destroyed by battle, are unaffected by other card effects, also they cannot attack or change their battle positions.

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If your opponent drops their own powerhouse activated ability, you can easily absorb it into Krajs pulsing mass by putting a counter on it, buffing their creature and yours in one fell swoop