Furnace Host Charger is a common Creature — Phyrexian Giant card from March of the Machine (MOM), collector number 140. Current market price: $0.16 (foil $0.19), TCGplayer market prices via Scryfall.
Haste Mountaincycling {2} ({2}, Discard this card: Search your library for a Mountain card, reveal it, put it into your hand, then shuffle.)