Herald of Eternal Dawn $12.40 As befits an angel, Herald of Eternal Dawn is miraculous with its flash ability and extremely oppressive
It's very strong in multiplayer since you are more likely to be running at least one opponent with Green ramp and two-drop ramp spells like Rampant Growth and Farseek are getting added to ramp brews in Commander over conventional ramp like Cultivate and Kodama's Reach, so on the turn you have three mana, one player casting a two mana ramp spell with an extra land is pretty likely, and if not, then someone probably cast Explore spells or dropped an Exploration and an extra land or two
Ethersworn Sphinx A 4/4 sphinx with flying is no joke, and with cascade youre guaranteed to hit something extra
Decks that run Temple of Sinnoh tend to run 1-2 copies of the card.
This confusion is understandable, as Wizards doesnt usually release products seemingly from the same set months apart from one another
Regardless of your archetype, winning in Commander generally means finding ways to scale the value of your board multiplicatively with each new turn, rather than linearly