Frilled Cave-Wurm is a common Creature — Salamander Wurm card from The Lost Caverns of Ixalan (LCI), collector number 57. Current market price: $0.14 (foil $0.19), TCGplayer market prices via Scryfall.
Descend 4 — This creature gets +2/+0 as long as there are four or more permanent cards in your graveyard.