- Challenge Card: Thwack U
- Binds when picked up
- Unique: Challenge Card (1)
- Rank 5
- "Present to a Brawler's Guild representative to challenge Thwack U. You can only hold one Challenge Card at a time."
- Sell Price: 75
Challenge Card: Thwack U is a Challenge Card that summons Thwack U to fight in the 
Bizmo's Brawlpub or 
Brawl'gar Arena.
Source[]
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Patch changes[]
Patch 7.1.5 (2017-01-10): Added.
