Wynncraft Wiki
Corrupted Treasure

Item Nether Brick
Type Quest Reward
Obtain Completing Reincarnation
Usage Buying Level 75 Legendary Weapons

The Corrupted Treasure is part of the reward for completing the Reincarnation quest. You use it to purchase Bob's Mythic Weapons located in the Temple of the Legends. They were the best weapons prior to the 1.14 "Gavel" Expansion and are now equivalent to level 75 weapons.