Augur of Autumn is much less of a factor for red decks, and theres no right or wrong way to approach this balance, but I do think that its meaningful to think of Courser as an anti-red card and decide how much you care about that sort of thing
If you play only one, you don't have to worry about the Legend rule, and the land enters untapped and taps for Blue without a drawback
This deck snowballs extremely fast once you get your engine running
6 Zethi, Arcane Blademaster You'll Get A Kick Out Of This One Zethi is the in-universe version of Chun-Li, Countless Kicks from the Street Fighter Secret Lair crossover
Sample Decks: Niv-Mizzet, Parun Commander and Arjun, the Shifting Flame Commander 10 Treasure Treasure decks have gotten progressively stronger, and that's largely thanks to how many red cards can create them