Mermail Abyssteus [CBLZ-EN083] Ultimate Rare The Legend of Blue Eyes White Dragon when an opponent's monster effect

when an opponent's monster effect is activated: You can detach 1 Xyz Material from this card

GX Tag Force Promotional Cards Card type: Effect Monster Rarity: Super Rare Attack: 800 Defense: 800 You can reveal this card in your hand to send the top card of your Deck to the Graveyard

Set: Astral Pack 5 Card type: Effect Monster Rarity: Ultimate Rare Attack: 1800 Defense: 200 Once per turn

Set: Shonen Jump Championship Series Promos Card type: Effect Monster Rarity: Ultra Rare Attack: 700 Defense: 500 Pay 5000 Life Points

During either player's Damage Step

Mermail Abyssteus [CBLZ-EN083] Ultimate Rare The Legend of Blue Eyes White Dragon when an opponent's monster effectSet: Cosmo Blazer Card type: Effect Monster Rarity: Ultimate Rare Attack: 1700 Defense: 2400 You can discard 1 other WATER monster to the Graveyard; Special Summon this card from your hand. When you do: Add 1 Level 4 or lower "Mermail" monster from your Deck to your hand. You can only use this effect of "Mermail Abyssteus" once per turn.