The game plan is to answer threats with Zoro and Kyros (KO and bounce) to control the board, use Colosseum to apply pressure, and rely on Usopps leader draw to keep your hand healthy even as you trade pieces
CAVALIER OF FLAME Cavalier of Flame is a nice self-wheel option that gives you some selectiveness if theres one card you absolutely want to keep, you can just ditch the rest of your hand and keep that one
(Zero is even.) Adamant If at least three colorless mana was spent to cast this spell, return a permanent card with an odd mana value from your graveyard to the battlefield
Given what little I know about the Necrons, this seems perfectly in line with how they do things
It has some fun cards for Commander like Colossification and good mono-green support like Yorvo, Lord of Garenbrig
Kamahl, Heart of Krosa You don't need to go mono green to maximize Kamahl, Heart of Krosa