Of the mechanics in Khans I added three (really only two because I only added one card)
- Outlast - Mostly added this because a few of the outlast creatures gave creatures with +1/+1 counters extra abilities. I have a lot of ways to give creatures +1/+1 counters so these creatures would benefit those decks a lot. The actual Outlast ability was secondary.
- Ferocious - Works well as there are a lot of 4 power creatures in the cube or ways to get 4 power creatures.
- Prowess - Only added one card with this ability, Monastery Swiftspear, as it plays well with the Izzet Blitz archetype I have present. Blue has no cheap Prowess creatures and I don't really think going Jeskai Blitz would work well in limited (white has a few cheap Prowess creatures). Admittedly there is a lot more fixing in my cube so it could work. Something to think about in the future.