The Last Warrior from Another Planet (DB2-EN012) - Dark Beginning 2 Unlimited Attribute_TRAP you can negate the Summon

you can negate the Summon of a monster and destroy it

White Dragon Ritual

and you take no Battle Damage when they battle

Card TextNegate the activation of an Effect Monster's effect that activates in the hand or in the Graveyard

its original ATK becomes 2100

The Last Warrior from Another Planet (DB2-EN012) - Dark Beginning 2 Unlimited Attribute_TRAP you can negate the SummonTypeWarrior Fusion Effect Monster AttributeEARTH Level Rank7 ATK DEF2350 2300 Card TextZombyra the Dark + Maryokutai When this card is Special Summoned, destroy all monsters on your side of the field except this card. As long as this card remains face up on the field, both players cannot Summon (including Flip Summon or Special Summon) any monster