I liked the idea from 4e of "Shrouds" you could apply to targets, and think that could be expanded into a more diverse set of options, including skill check effects and movement or location stuff.
Like, say you have a Ninja subclass of Assassin. They could mark a location with their Shroud effect, or an enemy or ally, and then be able to instantly teleport to any location they have Shrouded, what the Japanese call shukuchi, literally "shrinking the earth" (shrinking the distance between their current location and their destination to the size of a single step). Higher level could grant you more options, more simultaneous Shrouds, and more potency with the options you do have (e.g. you can shukuchi teleport from further away).
Would be a genuinely distinct approach to gameplay, non-spellcasting, but still supernatural.