There is one challenge event per month. It begins on the 2nd Thursday of the month and continues through the weekend, and rotates through four possible events in the order listed below, beginning in January 2019:
During the event, the Event Summon replaces the Elemental Summon, bringing along heroes unique to each particular event. The Challenge Event may be accessed via the "Quests" button.
Rewards & Ranks
Rewards from the Challenge Event depends upon both how many stages you've completed, as well as how many points you have acquired along the way. More points are rewarded for completing stages as quickly as possible with as high health as possible. Rewards for the December 2018 Knights of Avalon event offered the following reward tiers:
Ranks: | 50,000+ | 3001-50,001 | 101-3000 | 11-100 | 2-10 | 1 |
---|---|---|---|---|---|---|
Summon Token | x | x | x | x | x | x |
Energy Flask | x | x | x | x | x | |
Various Items |
2 | some | lots | tons | tons | |
Epic Troop Token | x | x | x | x | ||
Epic Hero Token | x | x | x | |||
Ascension Materials | 2 | 5 | 6 | |||
Avatars | 1 | 2 | ||||
4* Event Hero | 1 |
Event Quests
Each event has three different tiers of quest: Rare, Epic, and Legendary. Each tier consists in 10 stages.
Rare:
- Heroes must be 3* or less
- Troops and items must be 1* or 2* only
- Stages cost between 3 and 6 World Energy each
Epic:
- Heroes must be 4* or less
- Toops and items must be 3* or less
- Stages cost between 3 and 7 World Energy each
Legendary:
- All heroes, troops, and items are permitted
- Stages cost between 4 and 8 World Energy each
See the event page in question for more information on the individual quests.