Come set sail on your very own adventure
A bunch of extra Rampant Growths and artifact tokens on top of a creature that improves your taplands all adds up to a powerful package
Divergent Transformations, meanwhile, is just odd but provides an interesting double-Polymorph effect if you can use it on your own creatures, especially tokens or creaturelands, so you can exert some control over which creatures you hit
Finally, the deck has a number of utility spells including removal (Banishing Light, Season of the Burrow), card draw (Finneas, Harvestrite Host), and more
Popular cards like Eternal Witness work just as well as less used ones like Sam's Desperate Rescue and keep your goal of taking over with the big beast alive
If you don't put it onto the battlefield, put it into its owner's hand