Manaforce Mace

Domain is a rate dial disguised as an equipment buff: the same mace that grants +1/+1 in a mono-color shell hands out +5/+5 in a five-basic manabase, and everything in between scales linearly with how greedy your lands are. That makes this a payoff that prices itself against your own deckbuilding rather than a flat reward. The design tension is honest about it, too: a creature wearing this in a two-color deck is a Vulshok Morningstar that costs more to equip, while the wedge or five-color pile that can turn it on is also the deck most exposed to mana stumbles and color screw. Equip is the friction that keeps the ceiling from being free; even fully online, you are spending a turn's worth of mana to re-suit up after a removal spell. What lands it apart from generic stat-stick equipment is that it asks a question most aggressive decks would rather not answer (how much consistency are you willing to trade for raw size?) and then pays out proportionally. It is one of the cleaner uses of domain as a tuning mechanic: a card whose entire power curve is a function of how committed you are to splashing.