With Expressive Iteration and Prismatic Ending, the deck would be worse off for not running the red
You want to cast Omnath, Locus of Rage for 4 mana
Visions introduced the card Odyssey tried to change up the creature types, so instead of focusing red on Goblins, I changed the main red creature type to Dwarves
Green Dragon, for example, is a six-mana 4/4 with flying and the Poison Breath ability
Free enchantment recursion every turn is great, and it'll be incredibly easy to avoid those finality counters from mucking up your plans
The life loss for your opponents will be fairly negligible, and every once in a while they'll get an extra ETB out of it, but none of that will compare with you returning your Myr RetrieverMyr Retrievers or The One RingThe One Ring every turn