mtg arcades commander deck the Strategist Arcades the Strategist - Walls

Some sub-themes include: the synergy between Huey, Dewey, and Louie, Donald Duck's nephews from Ducktales

While none of the competitive success has to do with it being a dinosaur, you could undoubtedly satisfy the companion requirement with a dino build since they have a naturally high mana value for the most part

If the enchanted creature is no longer on the battlefield when Penumbra Umbra's second ability resolves, use its copiable values as it last existed on the battlefield

Enter Path to Exile, which is a very literal description of what this white instant does

Hitting the five different mana values is easier than it might seem in a singleton format as long as you build your deck with a functional curve

All that kelp will look great in your dusty box