As always, it's difficult to predict which cards in Shimmering Skies will prove the most competitive in the long run, but some are clearly impressive options from the start
Zegana can help you do more damage by giving creatures trample, and you can also include Simic Ascendancy as an alternate wincon
This is because whenever Millicent or a nontoken Spirit you control deals combat damage to a player or dies, you create a 1/1 Spirit token with flying
Much like Athreos, Heliod is great as a commander or as an inclusion in your deck
While eight mana can be a bit unwieldy, eight energy to grab it out of the graveyard for a turn for an alpha strike is easy to arrange, and will have huge results if you've got a developed board
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