Its more a matter of perception. Time did not flow at all under influence of the skill so the amount of time passed can only be determined by the individuals own personal perception of time. Is the reason why for the lady it felt like 300 years and for mc it felt like 3 years bc they both perceived it differently ╮(￣▽￣)╭
spoilers (read at your own risk)
It was a skill that stop the time (it was originally owned by Seo's school friend with a yellow hair). Since they don't have knowledge about the 4 terrains, the countdown is their main enemy (every dungeon have timeframe to conquer else it will break) so logic aside, they indeed spent 300 years inside the dungeon which is all recalled by the surviving hunters. (*/ THEORY: similar to an overflowing bottle that forcefully suppressed and by the time they got out of the great dungeon the skill ceased and had side effects since the World is just 297 years behind from their own physical and mental being.)
this is all I can talked about any further information will ruin your experience with the story.
Uuuuuuuuu i love spoils tho haha if u spoil me more ill give you a cookie
Im confused
It felt like 300 years but they were actually 3 years inside? The translations are a little wonky to better understand