Is Dreadbore where the red comes from, or perhaps red's "exile if killed" like in Red Sun's Zenith? I guess Dreadbore establishes this ability in Rakdos. Yeah, I guess black doesn't do much exiling from the battlefield so Rakdos is probably best.

@Sorrow yeah the idea was mixing Dreadbore with something like Slaughter Games / Surgical Extraction, but to go one step further instead of by name of the planeswalker to go instead by type of planeswalker. I did question the whole exiling target planeswalker in rakdos at first, but it doesn't feel out of place imo considering red cards having the ability to sometimes exile things they hate, that being nonbasics (Sowing Salt) and artifacts (Into the Core)

I really like the idea, but I can't tell whether this is Mudhole level of narrow haha. Will it be too broken as "Name a planeswalker type. Destroy all planeswalkers of that type target player controls. Search that player's graveyard, hand, and library for any number of cards with that planeswalker type and exile them. Then that player shuffles his or her library." ?