YuGiOh 2019 Gold Sarcophagus Tin Mega Pack Prismatic Secret Rare Knightmare Mermaid MP19-EN025

Water. Fiend/Link/Effect. 1 Knightmare monster, except Knightmare MermaidIf this card is Link Summoned: You can discard 1 card; Special Summon 1 Knightmare monster from your Deck, then if this card was co-linked when this effect was activated, you can draw 1 card. You can only use this effect of Knightmare Mermaid once per turn. Monsters on the field lose 1000 ATK/DEF, unless they are co-linked.