they... really, really aren't. the closest you get is something like 'the ninja,' where he'll deliver a quick and fatal blow, but this... doesn't even have to be that. this is more like lancer and gae bolg in that if it hits, it's fatal. difference is it's always active and not something stated and that it's luck dependant to how fatal it is. thing is then you add in the whole missing clause and just.... why?
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"Maybe it's a tentacle, molesting the planet itself. - Aschen Brodel.