Gilded Ambusher is a rare Enchantment Creature — Lizard Glimmer card from Alchemy: Duskmourn (YDSK), collector number 22.
Whenever Gilded Ambusher attacks, you may sacrifice another nonland permanent. When you do, each opponent exiles a nonland, nontoken permanent they control and a random nonland card from their library, then Gilded Ambusher deals damage to them equal to the total mana value of the cards exiled this way.