Challenge Card: Ash'katzuum

Challenge Card: Ash'katzuum is a Challenge Card that summons Ash'katzuum to fight in the Bizmo's Brawlpub or  Brawl'gar Arena.

Source
The item can be bought for from:
 * Card Trader Leila in Bizmo's Brawlpub
 * Card Trader Ami in Brawl'gar Arena