Cannot be Normal Summoned Set. Must be Special Summoned with the effect of a Bonding Spell Trap. If this card is Special Summoned: You can activate this effect; Effect Monsters your opponent currently controls cannot activate their effects for the rest of this turn, also change their ATK to 0 until the end of this turn. (Quick Effect): You can Tribute this card; Special Summon 2 Water Dragon from your hand and or Deck in Defense Position, ignoring their Summoning conditions.