The equipment sub-theme it enables can benefit your other knights by giving them gear to overpower your opponents, while always keeping the option open to go full Voltron once your commander hits the field
If you have a 2/2, a 2/3, a 3/3, a 3/4, and a 5/5, then abilities with coven will work since you do have three different power values on the board
By offering a reward for aggression directed elsewhere, this stands out among red Auras for MTG by effectively paying the rest of the table to ignore you and focus on a common rival
Triomes are especially powerful here because one triome gives a single fetch access to three colors at once, which is why three- and four-color decks lean on them so heavily
EMERGENCE ZONE I think with all of the flashy new options we keep getting and peoples tendencies to cut lands to scarily low quantities Emergence Zone has been forgotten about