Knightmare Mermaid (MP19-EN025) [2019 Gold Sarcophagus Tin Mega Pack]

1 "Knightmare" monster, except "Knightmare Mermaid" <br>
<br>If 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.