It comes in virtually every single Commander precon, and its a poster child of the format
Of course, you need your own creatures in play to fight something, but that wont be difficult for a green deck to achieve
But to what end
CLEON, MERRY CHAMPION Doublestrike static on a card is something I like to see, and you can have your spells that target Cleon essentially get a weak cantrip
It sounds more complicated than I mean it to be: You know the concept from Final Fantasy and Shin Megami Tensei : Fire does a little fire damage, Fira a little more
My prediction: Over Rosa, Resolute White MageRosa, Resolute White Mage Reach on a commander is underwhelming, and a couple free counters can't make it overwhelming, or even regular 'whelming