While you can only spend the mana on an equipment spell or to activate an equip ability, its still pretty darn monumental to see a one mana red mana dork
There is a one-directional population shift of sorts, where early in the game the battlefield of the living is the main focus, while near the end of the game the Afterlife is the main frontline of battle
//// Slicer, High-Speed Antagonist Color indicator: red Legendary Artifact Vehicle 3/2 Living metal (As long as it's your turn, this Vehicle is also a creature.) First strike, haste Whenever Slicer deals combat damage to a player, convert it at end of combat
Don't sleep on the final ability to give a key legendary dork hexproof or indestructible until the end of the turn
Your stuff gets the counters too, so that's nice
They can still tap those lands for mana in response to Pale Moon, allowing them to have colored mana during their turn anyhow