There was one week a while back where I was playing mm&m a lot (not much HW).
Anyway, a lot of the time it was mostly magi like... wind, lightning, water, wind. The games were taking long. Somehow the game just ended. I was like "what?" and someone said "skeleton glitch worked lololoolol."
After a period of questioning and playing again and again, the glitch became clearer. After the heretics on Dark Island raise some skeletons, the glitch starts. At random points in the game, skeletons spawn across the war-island (maybe the main island too, idk though).
Once "active," the glitch has a random chance to make one side win. Sometimes it works, sometimes it doesn't. One time, skeletons started spawning at a point between the fountain and the war-island way-gate, and also near the top lane.
The "win" thing acts as such: a side spontaneously wins. e.g. "YOU HAVE BEEN DEFEATED/ YOU HAVE WON!"
tl;dr: once a heretic raises skeletons it has a random chance to make a side win. Solution: look into the raise skeletons skill.
Wierd: apparently "Mages" isn't a word. But magi is.