Lurking Skirge is a rare Enchantment card from Urza's Legacy (ULG), collector number 55. Current market price: $0.58 (foil $17.00), TCGplayer market prices via Scryfall.
When a creature is put into an opponent's graveyard from the battlefield, if this permanent is an enchantment, it becomes a 3/2 Phyrexian Imp creature with flying.