Should I Kill Silus Vesuius in Skyrim?

When It Makes Sense

• Good fit: You are pursuing the Oblivion Walker achievement or trophy, which requires collecting all 15 Daedric artifacts in a single playthrough. Mehrunes’ Razor counts as one of those artifacts, and the only way to receive it during the “Pieces of the Past” quest is to follow Mehrunes Dagon’s command and kill Silus Vesuius. If you are a completionist or trophy hunter, this makes killing Silus the mechanically necessary choice.
• Good fit: Your current character build or roleplay justifies ruthless, pragmatic, or Daedra-serving decisions. Silus is the curator of the Mythic Dawn Museum in Dawnstar and is obsessed with the cult responsible for the Oblivion Crisis. If you are playing an assassin, a mercenary, an evil Dragonborn, or a character who bargains with Daedric Princes, executing Silus fits the narrative and gives you a powerful reward.

When You Should Avoid It

• Warning sign: You are roleplaying a noble, heroic, or law-abiding Dragonborn. At the moment of the decision, Silus is not hostile and is essentially an unarmed scholar. Killing him is a cold-blooded execution demanded by Mehrunes Dagon, which may break immersion or conflict with the moral identity you have built for your character.
• Warning sign: You already have Mehrunes’ Razor from another save, are playing a build that does not use daggers, or are not interested in achievements. The dagger is powerful but niche; if it will sit unused in your inventory, there is little practical reason to take Silus’s life.

Pros and Cons

Pros

• You receive Mehrunes’ Razor. This unique Daedric dagger has a base damage comparable to other Daedric daggers and carries a special enchantment with a small chance to instantly kill almost any target, including some dragons and boss-level enemies. It is especially valuable for assassins, one-handed fighters, and characters who enjoy burst-damage weapons.
• You complete a required step for the Oblivion Walker achievement. Because Mehrunes’ Razor is one of the 15 Daedric artifacts, sparing Silus locks you out of the achievement on that character unless you reload an earlier save.

Cons

• It is a dark, irreversible act. Silus is a named, non-hostile NPC when you meet him, and killing him is treated as murder. If you later decide the choice does not fit your character, you must reload a save from before the decision.
• There is no alternative reward for mercy. If you spare Silus, he runs away frightened and Mehrunes Dagon withholds the Razor. The quest ends without giving you the artifact, so the only payoff for a moral choice is your own roleplay satisfaction.

Decision Checklist

• Do I want Mehrunes’ Razor for my current build, or am I only collecting it for the achievement?
• Does killing Silus fit the moral identity and story I have created for this Dragonborn?
• Am I comfortable with the permanent consequence of killing a named NPC, knowing I cannot reverse it without reloading an earlier save?

Alternatives to Consider

If you are uncertain about killing Silus, you have several practical paths. You can decline or abandon the “Pieces of the Past” quest entirely, leaving Silus alive in Dawnstar with his museum intact. You can also spare him at the shrine and roleplay the choice as rejecting Mehrunes Dagon, accepting that you will not receive Mehrunes’ Razor on this character. Another option is to complete the quest on a different save file or character, letting one Dragonborn claim the dagger while another remains morally clean. Finally, if you are on PC and primarily care about roleplay rather than achievements, console commands or certain mods may allow you to obtain the artifact through non-lethal means, though this bypasses the intended quest design.

Final Recommendation

The decision to kill Silus Vesuius in Skyrim should be driven by your goals for the current playthrough. If you want Mehrunes’ Razor or need it for the Oblivion Walker achievement, killing Silus is the intended path and is a sensible choice for pragmatic, power-focused, or evil-aligned characters. If you are roleplaying a hero, dislike killing non-hostile NPCs, or have no use for the dagger, sparing Silus is the more thematically consistent option. Because this is a single-player video-game choice with no real-world stakes, either path is valid; simply make sure it matches your character’s priorities and your comfort with the consequences. If you are unsure, save your game before the shrine confrontation so you can experience both outcomes and decide which one feels right.