Still, I'd recommend that if you want to upgrade Elven Empire with another precon and without serious budget constraints, Guided by Nature is a good step in the right direction
Besides questing for two lore, he has the "Play it Cool" ability that allows players to draw a card whenever one of their characters is banished in the opponent's turn
Because youre in Black, you can probably benefit from every single one of those downsides, so Rankle can be incredibly powerful in the right decks, and if theyre your commander, then theyre probably in the right deck
This will give you a variety of options for different situations
Yuna, Hope of Spira Yuna obviously wants some summons to be good, but it does incredible work even with just common ones like Ifrit and Fat Chocobo
either of these creatures could be the commander of your deck, but you might need to make a few tweaks to optimize the deck for them