Its not super-exciting, as you frequently want your sideboard interaction to be streamlined and efficient, particularly when combating problematic artifacts and enchantments
Another possibility is to just aim a lot bigger, perhaps a return to red devotion
I'd personally pick Charmander just because loading up on Fire energy and smashing the shit out of everyone with Charizard is priceless
Older sets, especially those with limited print runs, often hold nostalgic value, and even common cards can become surprisingly sought after
Overgrown Zealot Overgrown Zealot has many homes, be it toughness-matters decks, morph/manifest dread/disguise decks, and the like
Wizards says it brought in Hexproof as a replacement for Shroud, which was deemed too confusing and too commonly misunderstood