When can the legendary 4-level meteor fire and rain be synthesized?

Class 4 meteor fire and rain can be synthesized after 90 days of service.

In addition, it can be redeemed in Honor Mall after opening 120 days. As for upgrading to level 4-6, it will take 45 days after opening the zone. Meteor fire rain is open for 60 days, and it will be sent when it is charged for 3000; It can also be synthesized in Ishihara after 90 days of service; Or 120 days later, it will be exchanged in Honor Mall and upgraded to Grade 4, 5 and 6. It takes 180 days, 2 10 days and 240 days to open the area respectively.