I am playing Yeti this time, event starts 15th March 2023, ends 19th April 2023 before patch.
Here the NPCs and maps, hope help you.
Stan's Letter to Yeti 1:
A pirate master - Kyrin of Nautilus Navigation Room
A wise master who researches forgotten knowledges - Lirin of Rien
An oldest and wisest magic master - Alcaster of El Nath
Stan's Letter to Yeti 2:
1st Photo - Direction Signboard of El Nath
2nd Photo - Targa of Fantastic Theme Park Main Gate
3rd Photo - A Bowl of Mushrooms of Partem Karupa Village
4th Photo - Hot Air Balloon of Nautilus Harbor
5th Photo - Bookshelf of Ellinia Magic Library
Hidden Mission:
The spectacular festival held at the river over the Time Gate with the reddest flower.
- Red flower, festival, river, over Time Gate... Lacheln?
Maybe confirm it in later time or no.
