Farewell is possibly the best boardwipe in the whole of commander, with its versatility and ability to exile (not destroy, importantly) whatever you need at that moment while protecting the other types you want to keep around
Youll want to be jamming with Yuna, Hope of Spira (just like the potential new best deck in Standard!), use Sanctum Weaver for big mana plays, and take advantage of the many enchantress card draw options, from Sythis, Harvests Hand to Enchantresss Presence
Mirabel can quest for a huge five lore, a whole 1/4th of what you need to win all at once
And that's before we have any idea what supply will be like
Glossy sleeves can look nicer but can stick when there is even slight moisture in the air
Hes the perfect addition for any player looking to transition from a basic Sapphire starter into a more competitive item-control archetype, as he bridges the gap between early-game ramping and late-game dominance