There's many ways someone can build MatoyaMatoya, and I hope that this deck tech inspires you to scry or surveil as Richard Garfield intended
The downside is that Trumpeting Carnosaur is worse against Force of Will, since it needs to enter the battlefield for the Discover ability to happen
Theme Card Thryx, the Sudden Storm Voracious Greatshark Delightful Discovery Brineborn Cutthroat Capture Sphere Naiad of Hidden Coves Opt Pestermite Spectral Sailor Starlit Mantle Stinging Lionfish Undersea Invader Thriving Isle 7 Island 0017_MTGJ25_Theme: Surprise
Multicolor Matters is already a somewhat supported theme, and it can work well within this archetype
Then Muldrotha, the Gravetide is the top commander for you
He has a power of 2 and Life of 3 as well as the abilities Lifelink which lets you heal for all damage he deals, and Throw Wide the Gates