Heaven Echo Altar

Heaven Echo Altar is a building unlocked by completing the secret in Otherworld Rift on day 120. It allows to access some PvP features by recording and sharing characters codes.
==Update log release==
Quoting from the building release changelog :A mysterious artifact found in the Otherworld Rift. It can connect with countless parallel worlds. It can be unlocked in a secret that happens on the 120th day.
After building the Heaven Echo Altar, you can enter the secret space in it. You can challenge other players.
Who is the strongest among you and your friends? Now you can figure it out.
Heaven echo Altar:
*Heaven Link: Let the controlling character resonate with the Heaven echo Altar, record him/her on it can get a share code. Other players can challenge your character by using these share codes
*Summon: Enter the share code to invite recorded characters. Or you can randomly choose a character that has about the same power as your character.
*Heaven Echo: Heaven echo Altar will crystallize energy in the void into spirit stones. After success, characters from other realms will compete with you for these spirit stones.
*Compile: Battle records of our characters linked. And can gain spirit stones won by your characters.