Kolaghan Monument

The mana rock that becomes a finisher is an old idea, and this is the two-color clan version: ramp on turn three that fixes both halves of a guild's color requirements, then waits out the early game until the board has a reason to need a body. The fixing matters more than the beats. A three-mana artifact that taps for either black or red smooths a deck wanting to cast spells in both colors without spending a land slot, and unlike a creature it ignores the sweepers that punish early aggression. The animation clause is insurance, not the plan: for six mana the rock turns into a 4/4 flyer that closes games when the board has stalled and your spells have run dry, which is precisely the spot a slow two-color deck tends to find itself. Crucially the artifact is not a creature until you pay, so creature removal slides off it while it does its real job of producing mana. That is the design tension the whole cycle of these monuments works inside: a card that wants to be ignored early and lethal late, asking for a premium each turn it should be the latter. The rate on the ramp is plain, the rate on the animation deliberately steep, and the card is honest about being a fixing piece first and a threat only when nothing else is left.