I remember an old game with this type of event, where each clan prepares for the yearly battle against a powerful boss. Rewards go to the top 3 players who deal the most damage individually and to the clan with the highest total attacks and damage. The winning clan earns a temporary boss buff, granting powerful enhancements until the next event. However, the winning clan cannot compete for the top clan reward in the next event, ensuring other clans have a chance — but they can join again after that event ends.

A good idea with some titles, each with a specific year, for example:

First place: Gold crown 2025

Second place: Silver crown 2025

Third place: Bronze crown 2025