If the cards can be used for decks that include either ink color, it would allow for more deck builds
Besides those, Stormsurge Kraken, and your three commanders, the deck is mostly blue staples
"The idea came early on to include a cycle of enemy color [Elder] Dragons as the founders of the five colleges
Rune-Tail, Kitsune Ascendant will generally flip immediately when you play it (especially considering a lot of attacks coming your way may be directed to your Planeswalkers instead of your life total), so it will make your creatures very resilient blockers, particularly Wall of Glare
That way you can still keep the pressure on even if Arcades has already died several times (and trust me, itll be a target)
Its built-in almost-Leyline of the Void that lets you steal the exiled creatures is a great effectgraveyard hate and denying opponents best spells will always be effective strategies in Commanderbut being a mono-black commander dampers its effectiveness as a true spider commander