Sibsig Appraiser is a common Creature — Zombie Advisor card from Tarkir: Dragonstorm (TDM), collector number 56. Current market price: $0.10 (foil $0.16), TCGplayer market prices via Scryfall.
When this creature enters, look at the top two cards of your library. Put one of them into your hand and the other into your graveyard.