Anger and resentment
Conditional skills are special skills that are innate from the start. Either in humans or the creatures or some other race, like humans. The innate skills, which are sometimes conditional skills, are one of the rarest but at the same time, one of the most unique skills in practice.
Though their uses are diverse and can be used in different ways depending on the possessor's imagination, they are skills that are most extraordinary.
They are powerful skills from the start and if a skill stone contains one such innate skill of some creature, which would have been lost forever if not been in a skill stone found by someone on time.
Well, anyway...
{Stark triangle} is a skill that, though unexpectedly, I just found out laying on the ground.
'There was also a mess of corpse which looked a looooot gruesome than one can think, so let's not think about it.'