Evilswarm Nightmare is a Super Rare XYZ Monster card from Yu-Gi-Oh! (Hidden Arsenal 7: Knight of Stars, HA07). Current market price: $0.77.
Super Rare
Hidden Arsenal 7: Knight of Stars (HA07)
Card Text
2 Level 4 DARK monsters
When your opponent Special Summons a monster(s) (except during the Damage Step): You can detach 1 material from this card; change that Special Summoned monster(s) to face-down Defense Position.
