By preventing players from untapping more than one land per turn, Hokori, Dust Drinker is able to halt any game immediately
Mountains Matter Another advantage of playing mono-red is access to cards that care about Mountains, with a prime candidate being Valakut, the Molten Pinnacle
When paired with consistent graveyard recursion cards found in Commander decks built around creatures like Meren of Clan Nel Toth, Spore Frog can allow its controller to essentially prevent damage that would be dealt to them every turn , keeping them alive long enough to enact whatever shenanigans they have in mind
Im torn on these changes as I actively used everything but Cauldron Familiar
You can fetch out the perfect Rebel for the given situation - such as the flying, protection from Black Nightwind Glider
If you need help with the lines or understanding why it's so good, I can walk you through it over Spelltable or Discord