Composite Golem

Six mana for a 4/4 looks like a rounding error until you read the back half: this body exists to be cracked, and sacrificing it floats one of each color into your pool at once. That makes the Golem a coiled five-color ritual rather than a creature you keep, a single source that satisfies any color requirement simultaneously, provided you have somewhere to spend the WUBRG before it drains. The timing is the whole discipline. Mana arrives only when you sacrifice it, and it lingers in your pool until the step ends, so you sacrifice it during a main phase and immediately pour the output into whatever you intend to cast, or feed it mid-cast to cover an awkward five-color requirement. It does not ramp in the ordinary sense; it converts a creature you spent six mana on into five mana of perfect fixing, a net-down trade unless the thing it pays for outvalues the Golem itself. That narrow window is what earns it a place in combo-leaning artifact builds, where a precise five-color burst unlocks a cast a conventional manabase never reaches. As fixing it is blunt and total: not a trickle of each color spread across turns, but all five colors delivered at once, exactly once, then gone.