Chromatic Infusion-Sapphire

Island Infused —Your Commander must be Mono Colored, and without a partner or background
( Put Chromatic Infusion-Sapphire into your
Command Zone )
Add {x}{u} to the mana cost of your commander,
where {x} is equal to the number of times it has
been cast from the command zone this game.
"Let logic dictate your moves, Knowledge is
perfection " —Merfolf Secretkeeper