2 "Hydratomic" monsters
Once per turn, if all monsters in your Graveyard are "Hydratomic" monsters: You can target 1 monster your opponent controls; equip it to this card, and if you do, this card gains ATK equal to the original ATK of that monster. (You can only equip this card with 1 monster at a time with this effect.) Once per turn: You can send 1 monster equipped to this card to the Graveyard; inflict damage to your opponent equal to its original ATK, but this card cannot attack the turn you activate this effect. If this card is destroyed by battle or by your opponent's card effect and sent to the Graveyard: You can target 1 "Hydratomic" monster in your Graveyard, except "Apocalyptic Knight - Hydratomic Angela"; Special Summon it.