Boulderbranch Golem is a common Artifact Creature — Golem card from The Brothers' War (BRO), collector number 197. Current market price: $0.34 (foil $0.40), TCGplayer market prices via Scryfall.
Prototype {3}{G} — 3/3 (You may cast this spell with different mana cost, color, and size. It keeps its abilities and types.) When this creature enters, you gain life equal to its power.