Queen's Agent is a common Creature — Vampire Scout card from Ixalan (XLN), collector number 114. Current market price: $0.09 (foil $0.40), TCGplayer market prices via Scryfall.
Lifelink When this creature enters, it explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)