One boss in Hellfire Citadel. The cube click during Blast Nova is the whole fight.
A screenshot of the entrance or the map works well here.
Bosses
| # | Encounter | What it is | Assignments | Pictures |
|---|---|---|---|---|
| 1 | Magtheridon | Five Hellfire Channelers are cleared first. Then Blast Nova has to be stopped by clicking cubes, on time, every time. | 9 | 1 |