Forsaken Monument

Colorless mana has always been the odd fuel: is deliberately harder to produce than any single color, and the payoffs that reward it have to be strong enough to justify the deckbuilding tax of running Eldrazi temples, Wastes, and mana rocks that specifically tap for colorless rather than generic. This gathers three of those payoffs onto one permanent and lets them compound. The doubler is the load-bearing piece: every source that produces suddenly produces two, which turns an Eldrazi-tuned manabase into a ramp engine that snowballs into the enormous casting costs colorless decks are built to pay. The anthem does structural work the doubler cannot: colorless creatures skew low to the ground, so +2/+2 across the board converts a swarm of small artifact bodies and Eldrazi Scions into a real board while the doubler builds toward the top end. The lifegain trigger is the safety valve, buying breathing room against the aggression a slow colorless deck tends to fold to. The three abilities are not a pile of stapled effects; they trace one loop: produce colorless mana, spend it on colorless spells, and collect at every step. The legendary tag is the honest cost of a doubler that would otherwise stack with copies of itself into something unbounded.