Moulinglacia the Elemental Lord [ABYR-EN035] Secret Rare 49 then Special Summon this card

then Special Summon this card (from your hand or Graveyard)

or shadowy Darkness

(It's an aura with "When you play an attack action card or attack with a weapon

IF the revealed card is a {Key} character

Moulinglacia the Elemental Lord [ABYR-EN035] Secret Rare 49 then Special Summon this cardSet: Abyss Rising Card type: Effect Monster Rarity: Secret Rare Attack: 2800 Defense: 2200 Cannot be Normal Summoned Set. Must be Special Summoned (from your hand) by having exactly 5 WATER monsters in your Graveyard, and cannot be Special Summoned by other ways. When this card is Special Summoned: Discard 2 random cards from your opponent's hand (or their entire hand, if less than 2). You can only use the effect of "Moulinglacia the Elemental Lord"