True respite and survivor

[NoNeet]

подскажите, как выполнить этот задание? какой обелиск?
how do this challeng? What the obelisk?

[Noah Wan]

obelisk - after 4+ stages, usually a blue portal appears after boss fight (not the shop blue portal but it is same color). Take the portal and do the jumps to the end and talk to the stone obelisk, choose sacrifice yourself which ends your run, and you unlock a character.

[Valinov]

"Celestial Portal" - after you go through the stages and loop back to the starting one it will show up after boss.