Mermail Abyssgaios
Level 7 WATER/Aqua Xyz Effect2800 ATK / 1600 DEF
2 Level 7 WATER monsters
While this face-up card has Xyz Material, Level 5 or higher monsters cannot attack. Once per turn, during either player's turn: You can detach 1 Xyz Material from this card; negate the effects of all face-up monsters your opponent currently controls that have less ATK than this card, until the end of the turn.
Mermail Abysstrite
Level 3 WATER/Sea Serpent Xyz Effect1600 ATK / 2800 DEF
3 Level 3 monsters
During either player's turn, when your opponent targets exactly 1 face-up "Mermail" monster you control for an attack, or with a Spell/Trap effect that could have targeted this card (except during the Damage Step): You can detach 1 Xyz Material from this card; that attack/effect now targets this card. When this card is destroyed and sent to the Graveyard: You can target 1 "Mermail" monster in your Graveyard, except "Mermail Abysstrite"; Special Summon that target.