Solitary Camel is a common Creature — Camel card from Hour of Devastation (HOU), collector number 23. Current market price: $0.08 (foil $0.34), TCGplayer market prices via Scryfall.
This creature has lifelink as long as you control a Desert or there is a Desert card in your graveyard. (Damage dealt by this creature also causes you to gain that much life.)