Hellhound Skull

Math Advanced's AddOldReward() function has 4 loot pools and it chooses one of them for each chest.

• 1 / 4 - Loot Pool #1
  
  
• 1 / 4 - Loot Pool #2
  
  
• 1 / 4 - Loot Pool #3
  • 300 / 1,000 - Hellhound Skull
  
  
• 1 / 4 - Loot Pool #4

(So 7.5% overall chance.)