Puresteel Paladin must be on the battlefield. Haakon, Stromgald Scourge must be on the battlefield. Lotus Ring must be on the battlefield. Anger must be in the graveyard. You control three or more artifacts. You control at least one Mountain. If the Knight has two colored mana symbols in its mana cost, you have one mana of either color available. If the Knight has three colored mana symbols in its mana cost, you have one mana of any of those colors, and two mana of any other one of those colors available.