Season 7 finale · 6:52pm Oct 28th, 2017
And so it was confirmed that Starswirl the Bearded was infected by the most insidious of Shas.
Pride.
Only through the power of Starlight Glimmer was he able to be humbled thus saving Stygian from a terrible fate.
On a side note, I've never mentally face palmed so many times when Twilight was about to do something REALLY stupid. Starlight should have had a rolled up newspapers to deck the so called "intelligent" member of the group before things went down.
>.=.<