The Vestige

 a limited time questline released on October 30, 2017. It the last main questline of Act 3 of the Treehouse of Horror XXVIII Event, preceded by Say His Name, Say His Name.

Quests
After finishing this Act 3 story, player can keep expanding their Magic Academy, enchanting Beasts and collecting Toad Princes. For every 15000 Toad Princes collected, player can get 1, 2, or 3 Donuts in Post-Magical Depression lottery.

Start
Unlocks the Battle for Springield at Magic Academy Ruins. Lord Montymort has only 4 health points remaining.

End
No dialogue.

Start
Giant Lord Montymort has only 4 health points remaining at the beginning of the fight.

Start
Lord Montymort slumbers for 4 hours, then he's full of health (15 points) again. And Giant Lord Montymort too.

End
Unlocks Lord Montymort as a controllable character.

End
No dialogue.

End
Lord Montymort's side quest The Sorcerer's Life Sentence becomes available.