Drakuseth, Maw of Flames feels right for the deck and Elesh Norn, Grand Cenobite can help clear out pesky small creatures (and help avoid some of the combos based around them from popping up)
Abilities that trigger when you discard a card will still trigger
But when you run small stuff, you often run into removal either mass or targeted, like opponents' Wrath of God or Cyclonic Rift
This is especially true because Pokmon Sun and Moon and Pokmon Sword and Shield sets are beginning to phase out in preparation for the release of the Gen 9 games Pokmon Scarlet and Violet
Also note that he really wants to attack as much as possible, which means you'll want ways to swing without your foe blocking like Rogue's Passage and Whispersilk Cloak
Flash Primary: Blue Secondary: White, black, and green Tertiary: Red Everyone gets some access to flash