Evilswarm Thanatos [DT07-EN090] Super Rare Forbidden Legacy you can negate the effect(s)

you can negate the effect(s) of 1 face-up monster your opponent controls

Special Summon any number of Level 4 or lower "Mermail" monsters from your Deck whose combined Levels are less than or equal to the Level of that monster

This card can only be Special Summoned by sending 1 Beast-Type monster from your hand to the Graveyard

your opponent cannot activate monster effects until the end of the Damage Step

Evilswarm Thanatos [DT07-EN090] Super Rare Forbidden Legacy you can negate the effect(s)Set: Duel Terminal 7 Card type: Xyz Effect Monster Rarity: Super Rare Attack: 2350 Defense: 1350 2 Level 4 DARK monsters Once per turn, during either player's turn: You can detach 1 Xyz Material from this card; this face up card is unaffected by other monster effects this turn.