Mox Jasper

A Mox is a promise: zero cost, immediate acceleration, mana before the game has really started. That promise is exactly what Black Lotus and the original five Moxen made, and the reason the cycle has spent decades on the restricted side of most conversations. This one breaks the promise on purpose. The mana ability is gated behind controlling a Dragon, so the free artifact you slam on turn one produces nothing at all until the board state you were trying to accelerate toward already exists. That inversion is the whole design: a zero-cost rock that sits dead in the opening hand of any deck without a Dragon in play, and becomes a free source of any color only once the tribe comes online. It reads like a power-level relic and functions like a payoff. The color flexibility (any color, not just the namesake stone) is generous precisely because the condition carries the balancing weight: five-color fixing at zero mana is safe to hand out as long as it never activates in the decks that would abuse it. What it rewards is a dedicated Dragon shell willing to treat a mana source as a synergy card rather than a ramp piece, closer in spirit to a tribal lord that matters only alongside its creature type than to the artifacts it shares a name with.