Indestructible, well, can't be destroyed." "That's a lot of vocabulary." "It is
This is the "vanilla" decklist: Rebuilding the deck is basically the usual process - remove ETB tapped lands, substitute in "better" aka typed duals, more basics (yes more, most precons have unnecessary non-basic duals, and then run cards like Kodama's Reach and Fertilid, such that they can quite easily run out of basics to search for.) Focus on the core aspects or the deck - getting +1/+1 counters out on small creatures and spreading them around, then leveraging the growth in +1/+1 counters via varied abilities to turn small creatures into big fatties
Solemn Simulacrum 3 OK filler but really on the pricey end
Its +1/+1 counter ability, like Archangel of Thunes life gain +1/+1 counter ability, is mostly just gravy but combines with a few cards that make it into the green midrange decks that will use Kalonian Hydra
They dont have many ways to interact with her, and with ramp that Nissa provides you can control the game easier while also killing our opponent with lands