Possible Rewards:

• Upgrade Chest
  
• Demon Chest
  
• Charm Chest
  
• 7 Flower Chest
  
• Spawn this wave's Elites again (Drops items, works with +Elite Amount)

Source: July 12 Update

Setup:

• Damage evolution and mutation as to be available ingame (upgrades -> mutation)

Ingame:

1. Get 5 spells
   
2. Get 1 Overlevel ready
   
3. Get 1 Reroll ready
   
4. Upgrade Damage till evolution
   
5. Wait till evolution and mutation are offered
   
6. Activate Overlevel
   
7. Get Damage-Mutation (+1 Spell)
   
8. Reroll Damage-Evolution into Damage-Mutation
   
9. Get Damage-Mutation (+1 Spell) a second time.
   
10. Get 6th Spell
    
11. Get 1 Overlevel ready again.
    
12. Wait till 2 weapons are offered in shop.
    
13. Activate Overlevel again
    
14. Get 7th and 8th spell.
    
15. Done

1. Complete a game with Max Corruption to increase the Corruption limit
   
2. Each Corruption grants enemies +1% Damage, +2% Protection, -1% Knockback
   
3. Each Corruption level also increases the Score Multiplier by 5%.
   
4. Corruption increases the Demon Chest drop rate

Source: The OBLIVION Update

• Common - 0 Oblivion
  
• Enhanced - 1+ Oblivion
  
• Rare - 7+ Oblivion
  
• Legendary - 13+ Oblivion
  
• Cosmic - 18+ Oblivion AND 13+ Malice
  
• Voidslayer - 25+ Oblivion AND 77+ Malice (everything)
  
• Voidslayer (level) - Voidslayer normal and most likly with 25+ Oblivion and 77+ Malice.

Voidslayer (level) numbers are not as they are written.
One of them promise me +7 revives.
Through Upgrades I have +2 revives.
Would mean I get +9 revives from the beginning.

But I only have +5 revives.