- Grand Challenge resets every Sunday at 5 a.m.
- Grand Challenge opens 5 more tiers every day at 5 a.m. There are 35 tiers for the whole week totally.
- Grand Challenge is available to level 60 players or above.
- Survived heroes' HP full regenerates and energy resets after each successful challenge.
- When a challenge fails, both your heroes and enemies will reset to the beginning of the challenge.
- all your heroes' HP fully regenerates and energy resets at 5 a.m.
- You can randomly choose from 4 chests to get a reward after each challenge.
Quick table to show difficulty and opponent:
Rewards will be progressively better as you both try harder difficulties and as you gain more tiers in each difficulty.
This is part of your daily routing, you only have to fight it once daily to earn credit, but can only fight it 5 times each day. Better to battle it 5 times each day, than be stuck trying to complete it Saturday night imho.