Furnace Spirit⁣ - Stronghold⁣ (Common)

Furnace Spirit is a 1/1 Spirit with haste, allowing it to attack immediately upon entering the battlefield. Its ability to pump its power for just one red mana makes it a solid choice for aggressive decks, where quick damage output is crucial. However, its low toughness means it can easily be removed, so it's best used in strategies that apply pressure quickly.