If its your first time competing in a tournament, I would definitely double-check the legality of all your cards, but otherwise, take it easy
Yes, modular is viable in EDH
Though the very first Dinosaur card debuted alongside Magic s first set (Fungusaur in Alpha ), many Dino cards were not immediately given the creature type save for Ice Age s Pygmy Allosaurus and the type was later removed in favor of Lizard or Lizard Beast. Then, enter the Ixalan block, which brought back the type from the dead and provided myriad kindred synergies that made Dinosaur decks a viable and deeply enjoyable strategy, especially in Commander
That also means that your deck isnt necessarily restricted, but you probably want to run mostly even-MV creatures for those times you trigger Gyrudas ETB
Its also got hexproof and generates mana of any color
I'm Levi from The Thought Vessel , and today, we're diving into a deck inspired by one of the new cards from Foundations : Hare Apparent