Genshin Impact has a Crown of Insight currently available through the Invitation of Windblume event. For those who are unaware, a Crown of Insight is one of the most rare and desirable items in the game. A Crown of Insight is a talent level-up material, and the only way players can level up a character's combat talent to level ten, the highest possible level.
Currently, there's only one way to get them outside of events, so it's highly advisable to take this chance to get another.
Genshin Impact: Crown of Insight Available Through Invitation of Windblume
The Windblume Event is a new event that was added in the recent 1.4 update. Though the event lasts until April 5, the event shop will be open until April 12, meaning you have until then to purchase a Crown of Insight.
It costs 400 festive tickets to purchase, which are obtainable through festive challenges. It'll be somewhat challenging to get the maximum cores and maximum amount of tickets, but with the right characters, skills, and timing, players should be able to eventually get enough for the crown. After getting a Crown of Insight, make sure to carefully choose which character combat talent they want to max out, as it's a limited currency.