Forewarned is Forearmed

A Fate Appropriator harbored two primary abilities:

Firstly, the capacity to magnify a corresponding fate tributary, thereby setting in stone an imminent destiny for the target. This process could be expeditious, yet its future influence spanned a mere ten seconds. The resulting efficacy was contingent upon environmental compatibility; a more congruent backdrop augmented the probability of the event materializing in the forthcoming future.

Secondly, the ability to swap an accumulated fate for a fragment of the target's own destiny. Absent a premeditated arrangement, one had to either kill the adversary to access their fate or employ their personal fate as a substitute. Relatively more protracted in execution than magnifying an impending fate tributary, this method prohibited one from assailing the target or inducing harm mid-process.