Hollow Knight: Silksong’s Act 3 ramps up difficulty and starts to lock off some side content, so you want to treat the end of Act 2 like a big “point of no return” checklist.

Big Picture: Before You Trigger Act 3

Before starting Act 3, aim to have three things handled: key quests finished, missables secured, and your build (health/silk/tools) in a strong place.

In practical terms, that usually means:

  • Clearing the important Act 2 questlines and wishes.
  • Handling missable NPC events and endings that disappear in Act 3.
  • Grabbing as many upgrades and mobility abilities as you reasonably can.

Must‑Do Quests and Wishes

Many players treat Act 2 as the “cleanup” phase for major stories and the Silk and Soul setup.

Try to finish:

  • Shakra’s quest (Trail’s End / Architect’s Melody line)
    • This ties into melodies and late‑game access and is specifically called out as something to complete before progressing.
  • Core Wishboard wishes in key hubs
    • Focus on Bone Bottom, Bellhart, and Songclave wishes, since these are mentioned as part of the requirements and recommended prep for moving toward Act 3 and the Silk and Soul quest.
  • “Big” Act 2 bosses and story beats
    • Players commonly list Grandmother Silk, the First Sinner, Broodmother, Groal the Great, and Shakra as bosses they try to clear before going forward.
  • Getting your personal Bellhome in Bellhart
    • This is referenced as part of the broader preparation path linked to the Silk and Soul route that leads you into late‑game content.

Missable NPCs and Events (Act 2 → Act 3)

Some Act 2 content disappears or changes once Act 3 starts, which is why so many guides and videos stress “do this before Act 3.”

Commonly highlighted missables include:

  • Clawmaidens
  • Shakra’s full line
  • Garmond & Zaza
  • Loam
  • Huntress
  • Crull & Benjin
  • Pilgrim’s Rest supply‑related content

If you care about lore, achievements, or seeing these characters’ full arcs, track each of them down and wrap up their events before you cross the Act 3 threshold.

Upgrades, Abilities, and Collectibles

Act 3 hits harder, so you want Hornet as stacked as you can reasonably manage without burning out.

Focus on:

  • Health and resource upgrades
    • Mask Shards for more health and Spool Fragments for more silk usage are strongly recommended; you don’t need every single one, but the more you have, the smoother Act 3 feels.
  • Core traversal abilities
    • Movement tools like double jump and advanced grappling are frequently recommended so you can reach hidden areas and handle tougher platforming segments.
  • Combat‑relevant tools and silk skills
    • Fill out your silk skills and toolkit so you have flexible options for both crowd control and boss fights. Guides emphasize being combat‑ready before the difficulty spike.
  • Optional bosses for notches and shortcuts
    • Optional Act 1–2 bosses often guard Silk Notches, shortcuts, or lore; taking them down now reduces backtracking and lets you enter Act 3 with a robust build.

Very Important Warnings (Spoiler‑Light)

There are a couple of subtle “gotchas” people warn about around the Act 2 → Act 3 transition.

Key points:

  • Be careful with curses going into Act 3
    • If you enter Act 3 while cursed, some players report the curse becomes effectively permanent, with no way to cure it afterward. Guides explicitly recommend removing any curse before starting Act 3 to avoid being locked into a harsher run.
  • Some endings/achievements are tied to your Act 2 state
    • Certain “infected” or alternate outcomes appear to be tied to completing specific sequences while still in Act 2, so if you care about multiple endings, make sure you’ve checked what those require before committing to Act 3.

Example Checklist You Can Follow

Here’s a simple, spoiler‑light “before Act 3” checklist inspired by community posts and guides.

  • Finish Shakra’s questline.
  • Complete major Bone Bottom, Bellhart, and Songclave wishes.
  • Get your Bellhome in Bellhart.
  • Defeat Grandmother Silk and the remaining Act 2 bosses you’ve discovered (First Sinner, Broodmother, Groal the Great, Shakra, etc.).
  • Wrap up NPC lines for Clawmaidens, Garmond & Zaza, Loam, Huntress, Crull & Benjin, and Pilgrim’s Rest supplies.
  • Collect a healthy number of Mask Shards and Spool Fragments.
  • Unlock key mobility abilities (double jump, grappling‑style upgrades, etc.).
  • Clear a few optional bosses for extra notches and shortcuts.
  • Remove any active curse before stepping into Act 3.

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Wondering what to do before Act 3 in Silksong? Learn which quests, NPCs, upgrades, and missables to prioritize so you enter Act 3 fully prepared and avoid losing rare content.

TL;DR: Before Act 3, finish big Act 2 quests and wishes, clear important NPC lines and missable events, stack health and mobility upgrades, defeat key bosses, and make sure you’re not cursed when you cross the point of no return.

Information gathered from public forums or data available on the internet and portrayed here.