My Little Pony - Curse and Madness - E5P3 (Patreon)

 Sketched by Rysunkowa, drawn by Shido-Tara.

Those missing ponies, they were kidnapped and TURNED INTO cultists. Turned into Tigronytes.

So now they can no longer annihilate the cultists, they must instead find a way to return them to their normal selves.