WebDiver

did he sense the extraction power could threaten him or the MC as a threat himself?

extract low rolls from summoning item = guaranteed high roll summon?

it will be op in medical field. eg. Extract diseased cells -Illness/Poison status resolved.

Can he extract treasures from a vault or box? Then with x ray vision or existing knowledge of the contents he can extract them out

Laputa

spatial fissure

world building paragraphs should feel natural and not forced. it should be shown in relation to when the mc interacts with something that is related to that.

so what happens to her if he dies

imagine a 9 year old boy saying attack

what if they don't start