Feedback [Alpha Edition] H20 You can only use this

You can only use this effect of "Mermail Abyssteus" once per turn

you can return all Dragon-Type Monsters from your Graveyard to your Deck

When this card is destroyed by your opponent's card and sent to the Graveyard: You can Special Summon 1 Spellcaster-Type monster from your hand or Deck whose Level is less than or equal to the number of "Spellbook" Spell Cards in your Graveyard

you must place it in face-down Defense Position

Special Summon 1 Fusion Monster from your Fusion Deck to the field in Attack Position

Feedback [Alpha Edition] H20 You can only use thisSet: Alpha Edition Type: Enchantment Aura Rarity: Uncommon Cost: {2}{U} Enchant enchantment At the beginning of the upkeep of enchanted enchantment's controller, Feedback deals 1 damage to that player.