The main library of milk nuggets should gain more skill points and experience points by upgrading its role.
The main library is refreshed every hour on the hour for 20 minutes.
Multidimensional world
Sky City: No harm, no monsters, many NPCs.
Main worlds: snow fox, snow monster, tengu, alpaca, sleepy hollow, New Year animals, etc. The above monsters will be brushed out in limited festivals, except for post stations, territories and villages.
Twilight Forest: Lord of the jungle, ghost warrior, banshee, woody cherry, any twilight monster will be brushed out.
Extreme cold: Frost witches and Obsidian guards will be brushed off by any extremely cold monster. (You need to complete the achievement "Twilight Conqueror" to enter)
Hot continent: Sphinx, Anubis, Cleopatra, any hot monster will be brushed out. (You need to complete the achievement "Twilight Conqueror" to enter)
Forgotten land: the core of the castle, the night goddess and the flame Lord will be brushed out by the advanced forgetfulness monster. (You need to complete the achievements "Song of Ice" and "Song of Fire" to enter)
Midgard: Valkyria, main boss Fenrir, Dark Dragon.