Hogwarts Legacy's most interesting side plot is your journey with Sebastian Sallow to find a cure for his sister. In The Shadow of Time quest, you'll be left with a choice of whether to side with Sebastian or Ominis Gaunt, over what to do with a Dark Relic, and here's what you need to know.
Should you use Imperio on Ominis during In The Shadow of Time in Hogwarts Legacy?
There are almost no story consequences for this choice. No matter what, you will leave the tomb with Sebastian and the Dark Relic and continue back to Feldcroft. Ominis will still be present through the rest of the side story, no matter what you do, even whether you decide to use Imperio or not. This decision will slightly change some of Ominis' responses to you later on in the questline.
Related: Should you free Penny or not in Hogwarts Legacy? (Minding your own Business)
If you haven't already learned Imperio from Sebastian, this may be your last opportunity to learn it. Ominis can teach it to you if you decide that using the curse on him is the best way to save their friendship. It can be a fairly powerful option for use in battle, particularly when used on stronger enemies, like Trolls.
Looking for other choices you can make in Hogwarts Legacy? Check out Should you pick Vesters and Venum, Cladwell and Brewster, or Stiches and Draughts in Hogwarts Legacy? or Should you give the mermaid necklace to Nerida in Hogwarts Legacy? here at Pro Game Guides.