I dont know if its a feature or a bug but it appears according to the description Wolfgang should be mighty when low health but he's only mighty for a few seconds then he returns to normal even though he's still at low health.
Steps to Reproduce
1.Play wolfgang 2. get low health 3. go mighty 4. lost mighty after 5 seconds
1.Play wolfgang 2. get low health 3. go mighty 4. lost mighty after 5 seconds
A developer has marked this issue as fixed. This means that the issue has been addressed in the current development build and will likely be in the next update.