Professor Zei, Anthropologist is a uncommon Legendary Creature — Human Advisor Ally card from Avatar: The Last Airbender (TLA), collector number 238. Current market price: $0.12 (foil $0.28), TCGplayer market prices via Scryfall.
{T}, Discard a card: Draw a card. {1}, {T}, Sacrifice Professor Zei: Return target instant or sorcery card from your graveyard to your hand. Activate only during your turn.