Excavating Anurid is a common Creature — Frog Beast card from Modern Horizons (MH1), collector number 163. Current market price: $0.17 (foil $0.40), TCGplayer market prices via Scryfall.
When this creature enters, you may sacrifice a land. If you do, draw a card. Threshold — As long as there are seven or more cards in your graveyard, this creature gets +1/+1 and has vigilance.