It was so fucking edgy it told of a isekai protagonist summoned from the the death of his parents that served as catalyst for the summoning. Oh and he returns from his first death as that was considered a tutorial Lol basically if sir lucifer morningstar wrote a isekai
Nidome no Yuusha??? Iirc it is deaths of all his immediate families plus anyone in his vicinity during summoning, 200 meter radius. Also, all the demihumans used initially to kickstart the summon.
Dear Truck-sama, that makes the summoners so much worse then just what we get from the series description.
Lol at least we know he's such a sadist/edgy person. They kill his parents use him for their dirty work, slander him and kill him at the end of his service. Boi if i would be pissed off and he's a really strong being too as it took almost an entire platoon of guards to take him down