Currently it extends the duration of tripmine grenade by about 20 more seconds. This armor piece is clearly designed for PvP and the biggest problem with tripmines are that they can be shot and destroyed easily. It'd be cool if Young Ahamkara's Spine extended the duration and made tripmines undestroyable.
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Or perhaps if it did something related to melee. It is an arm piece Exotic after all, with bones and spikes, so it makes more sense than trip mines.