Chosen Hero is one of the Events in Mighty Party.
Chosen Hero starts on Fridays at 10:00 UTC and ends on Tuesdays at 9:00 UTC.
When you first enter the Event, you need to choose a Hero that will be your reward for progressing through the Event.

Every Chosen Hero Event offers you to choose a Hero from specific Faction. For example, ranged Chaos Heroes or Melee Order ones.

Once you choose a Hero of your interest, you’ll be asked to confirm your choice. Please note that once you click Confirm, you will not be able to change the Hero for the duration of the Event.

This Event contains a roadmap with different Quests.
Completed Quests award you with Crystals and Event Points.

Crystals are used to spin Luck Sphere to be able to receive valuable rewards such as Hero Souls, Gems, Scrolls, Gold, etc.

In the Luck Sphere you can also see that your spins are counted. When you reach certain amounts of spins, you’re awarded with souls of your chosen Hero.

Event Points are used to progress in Event Pass. You can learn more about it here.

Chosen Hero also has its own Ranking where you can compete with other players for the generous gifts.
This Ranking depends on the amount of Crystals you collect during the Event.