Eureka Moment is a decent rate, especially for Commander, once you factor in the land drop
Commander players are looking for casual games where they get to show off their favorite decks and cards in a chaotic, splashy environment, and modes like Archenemy are great ways to stay true to that vision while breaking up the monotony of playing the same format all the time
In terms of abilities, beyond simply being a Knight himself, Oakenshield also lets you recur one creature a turn from your graveyard to your hand, giving you the staying power you need in a long Commander game
Using this card becomes easier and easier as legendary creatures naturally take more space in Commander decks
Molten-Core Maestro I am thinking this combined with something like Season of Loss or Season of Weaving
Repeat this process until you have infinite colorless mana