Heavyweight Demolisher is a uncommon Artifact Creature — Construct card from The Brothers' War (BRO), collector number 160. Current market price: $0.09 (foil $0.05), TCGplayer market prices via Scryfall.
Menace At the beginning of your upkeep, tap this creature unless you pay {3}. Unearth {6}{R}{R} ({6}{R}{R}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)