Battlefield Forge - Commander: Modern Horizons 3 (Rare) [M3C-321]

Battlefield Forge is a land that taps for colourless mana or provides red or white mana at the cost of 1 damage to you. This makes it a reliable source of mana for aggressive Boros decks that thrive on quick plays while sacrificing a bit of life for that flexibility. However, the damage can add up, so it's best used in strategies that can afford to lose life or have ways to mitigate it.