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No. Using Crucio, Imperio, or Avada Kedavra in Hogwarts Legacy does not branch the main story or change the ending, according to multiple published gameplay guides. The game may show occasional disapproving comments from students or teachers, particularly when you cast a curse at Hogwarts, but those lines are not reported to create a lasting reputation penalty or a different finale. The choices that matter are the dialogue decisions in Sebastian Sallow’s side-quest chain, which control when you can learn each spell, and the separate decision to turn Sebastian in. Those choices affect access to the curses and Sebastian’s future availability—not the consequences of casting them.
Does using the Unforgivable Curses affect the main story?
Available guides agree that casting the three Unforgivable Curses does not alter the main quest path, lock you out of an ending, or create a morality route. You can learn and use all three and still complete the same finale as a character who never casts them. Dexerto’s curse guide and PowerPyx’s Avada Kedavra guide both describe the spells as combat tools whose story relevance comes from how you obtain them, not from a hidden alignment system.
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That distinction matters because the curses are framed as forbidden magic in the fiction. The game acknowledges that reputation through occasional dialogue, but the reported reactions are local comments rather than a persistent crime, companion, or ending system. There is no evidence in the cited guides of a separate “bad” ending triggered by spell use.
What changes in gameplay, and what does not?
| What you do | Reported result |
|---|---|
| Cast Crucio | Deals damage over time to the target; no reported change to the main story or ending. |
| Cast Imperio | Makes an enemy fight for you; no reported change to the main story or ending. |
| Cast Avada Kedavra | Instantly kills its target when it can be used; no reported change to the main story or ending. |
| Use a curse around Hogwarts | Some guides report disapproving student mutters or teacher reactions, without a lasting punishment. |
| Refuse a curse in Sebastian’s dialogue | You may receive another chance later, depending on the spell and where you are in the quest sequence. |
| Turn Sebastian in after his questline | Can prevent future conversations with him and therefore block learning curses from him; this is a separate story choice. |
The first three rows are combat effects, not narrative consequences. The last three are access and dialogue decisions that occur around Sebastian’s quests. Keeping those categories separate prevents the common mistake of treating every dark-magic decision as an ending flag.
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How are Crucio, Imperio, and Avada Kedavra learned?
All three spells are tied to Sebastian Sallow’s optional side-quest sequence. The quest names identify where each curse is introduced:
| Curse | Associated quest | What the guides report |
|---|---|---|
| Crucio | In the Shadow of the Study | The Scriptorium sequence presents a dialogue choice about using or learning the curse. Windows Central reports that declining there can still leave a later opportunity in the Undercroft. |
| Imperio | In the Shadow of Time | The curse is offered during Sebastian’s quest progression; dialogue determines whether you accept it at that point. |
| Avada Kedavra | In the Shadow of the Relic | If the initial offer is missed, PowerPyx says Sebastian can teach it later in the Undercroft after the relevant questline. |
The exact prompt can depend on your previous answers, so read Sebastian’s dialogue rather than skipping through it. Refusing an offer is not automatically the same as permanently deleting the spell from your save. The guides specifically document later opportunities for Crucio and Avada Kedavra, while the broad lesson is that access is governed by quest dialogue and Sebastian’s availability.
Do students and teachers punish you for casting a curse?
Guides report occasional social reactions, especially on Hogwarts grounds, but not a durable punishment. Pro Game Guides says students may mutter and teachers may express dissatisfaction when a curse is used at school. Dexerto similarly describes disapproval in dialogue.
Treat those reports as occasional ambient lines, not as a dependable reputation meter. The sources do not establish a universal trigger, a cumulative point system, detention, loss of house privileges, or altered relationships. Pro Game Guides also reports no comparable complaints away from Hogwarts, so location may influence whether you hear a reaction. In practical terms, a comment can acknowledge the forbidden nature of the spell without changing what quests or endings are available.
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Which decisions actually affect your ability to learn the curses?
The consequential decisions happen in Sebastian’s side content, before or alongside the spell unlocks. They affect access to a teacher and a quest conversation, not the moral state of the main campaign.
- Follow Sebastian’s quest chain. The curses are unlocked through In the Shadow of the Study, In the Shadow of Time, and In the Shadow of the Relic. If you ignore the side quests, you simply do not reach the offers.
- Answer the learning prompt deliberately. Accepting an offer teaches the curse during that quest. Declining can defer access rather than end it; the documented later opportunities mean you should not assume one refusal has erased the spell forever.
- Keep Sebastian available if you want every curse. GameWith’s choices guide distinguishes the later decision to turn Sebastian in from curse use itself. Turning him in can stop future conversations and block the remaining lessons.
- Use the Undercroft as the fallback location when a guide identifies one. PowerPyx documents a later Avada Kedavra conversation there, and Windows Central reports a later Crucio opportunity there. These are quest-state opportunities, not penalties for having cast a spell.
If your goal is a complete spell collection, make a manual save before major Sebastian conversations and keep him accessible until his sequence is finished. That is a save-management precaution, not evidence that the curses alter the ending.
Can you get the same ending after learning all three curses?
Yes. The available reporting says that knowing or using all three does not prevent the game’s normal ending. The ending question is often phrased as whether a player can still receive the “good” ending after learning the curses; the guides’ answer is effectively yes because curse ownership is not presented as an ending-alignment variable.
What can change is the state of Sebastian’s storyline. A decision to turn him in can remove future interaction and cut off spell lessons, while choosing to learn a curse can produce a different line of dialogue in the associated quest. Those are local quest outcomes. They should not be read as a branch in the final main-story resolution.
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Should you learn the Unforgivable Curses or skip them?
Choose based on combat preference and role-playing, not fear of a story penalty. The guides describe clear tactical benefits: Crucio applies damage over time, Imperio temporarily turns an enemy into an ally, and Avada Kedavra can instantly kill a target. If you enjoy experimenting with dark-magic tools, learning them expands your combat options without closing the main ending.
Skipping them is equally valid if your character concept rejects forbidden magic. You may hear fewer disapproving lines simply because you will not be casting the spells, but the game does not require a no-curse run for story completion. You also do not need to learn a curse to finish Sebastian’s broader side content, although refusing a particular offer can change how that lesson is handled.
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- Skip them if your role-play avoids dark magic or you prefer not to use instant-kill and mind-control abilities.
- Delay the decision if you are unsure; documented later conversations mean at least some refusals can be revisited.
- Do not turn Sebastian in prematurely if obtaining every curse remains a priority, because that separate choice can remove his future lessons.
Common misconceptions about curse consequences
“Casting one curse locks me into an evil ending.”
The cited guides do not report such a lock. Casting affects a battle and may prompt a line of disapproval, but it is not described as a hidden ending switch.
“Refusing Crucio means I can never learn it.”
Not necessarily. Windows Central reports a later opportunity in the Undercroft, so the first dialogue refusal is not always permanent.
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“Turning Sebastian in is punishment for using curses.”
Those are separate decisions. Turning him in affects future conversations and spell access; it is not an automatic response to having cast a curse.
“Teachers will expel me for using forbidden magic.”
The available reports mention dissatisfaction or muttered comments, not expulsion or a lasting school penalty. The evidence supports occasional flavor dialogue, not a formal disciplinary system.
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What is the safest way to plan a curse-focused playthrough?
- Complete Sebastian’s quests as they become available and note the quest names tied to each curse.
- Create a manual save before a conversation that offers a spell if you want to preserve both acceptance and refusal options.
- Read every follow-up dialogue; a later Undercroft conversation may restore access after a declined offer.
- Postpone the decision to turn Sebastian in until you have learned any curses you still want.
- Use the spells wherever you choose, knowing that reported reactions are limited to occasional dialogue and do not change the main ending.
This plan separates collection goals from narrative role-play. You can secure the spells first and then decide how often to use them, or leave them unlearned without sacrificing completion of the main story.
What does the evidence actually establish?
The conclusion rests on several secondary guides rather than a directly quoted developer statement. Dexerto and Pro Game Guides cover the reported story and social effects; PowerPyx and Windows Central document later learning opportunities; and GameWith distinguishes Sebastian’s fate from spell use. Because no verified developer quotation or official consequence table was identified, the careful wording is that the available guides consistently report no main-story or ending change—not that every possible future update or undocumented line has been ruled out.
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Frequently Asked Questions
Are the Unforgivable Curses required to finish Hogwarts Legacy?
No. They are introduced through Sebastian Sallow’s optional side-quest sequence, while the main campaign can be completed without learning them. Skipping the spells changes your combat options and some quest dialogue, not the required path to the finale.
Where can I learn Avada Kedavra if I skipped the first offer?
PowerPyx reports a later conversation with Sebastian in the Undercroft after the relevant questline. Whether that conversation appears depends on your quest state and on keeping Sebastian available.
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Will using a curse outside Hogwarts stop NPCs from reacting?
The reported reactions are most associated with Hogwarts grounds. Pro Game Guides says it found no comparable complaints away from school, although the sources do not define a universal trigger for every location or NPC.
Does turning Sebastian in remove curses I already learned?
The documented effect is prospective: turning him in can prevent future conversations and lessons. The guides describe it as blocking access to curses you have not yet learned, not as revoking spells already obtained.
