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This could cover that spot for extra threat coming from the sideboard

The ratios for this deck is very good: lots of amazing mana advantage cards that really take advantage of the archetype like Sanctum Weaver, tons of Enchantress for card draw like Mesa Enchantress, great one-sided board wipes like Doomwake Giant etc

All that alone would make Sephara at least a bit interesting for Commander, but the alternative casting cost really pushes it to another level

Mutavault does this and more since its a changeling

The deck features the empathetic Amber characters who focus on team support and the mysterious Amethyst characters who can harness special powers to help you achieve your goals