Knowledge Seeker is a uncommon Creature — Fox Spirit card from Avatar: The Last Airbender (TLA), collector number 60. Current market price: $0.20 (foil $0.31), TCGplayer market prices via Scryfall.
Vigilance Whenever you draw your second card each turn, put a +1/+1 counter on this creature. When this creature dies, create a Clue token. (It's an artifact with "{2}, Sacrifice this token: Draw a card.")