Flexible Removal: Similar to silver bullets, some decks will want cheap and efficient ways to deal with threats, especially in aggressive matchups
Kimahri's restrictive mana cost and relatively minor abilities may limit its playability, but it could find a niche in casual Commander games or themed decks
Both Hildibrand and the Dreadknight are rather difficult to truly get rid of
The rares (and for Unstable , mythics) of Un-sets work the same way, with a twist: demand isn't based on playability, since none of the cards (discounting the black-border Steamflogger Boss reprint) are tournament playable
This is the final card in the any number in your deck cycle
I recently covered five reasons your Commander deck might not be performing, and the most popular reasons and the two solutions that can have the biggest impact were, unsurprisingly, ramp and card draw