Council of Echoes is a uncommon Creature — Spirit Advisor card from The Lost Caverns of Ixalan (LCI), collector number 51. Current market price: $0.09 (foil $0.20), TCGplayer market prices via Scryfall.
Flying Descend 4 — When this creature enters, if there are four or more permanent cards in your graveyard, return up to one target nonland permanent other than this creature to its owner's hand.