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Short answer: Grand Mother Silk is the final boss of the main Act 2 route. If you unlock and complete Act 3, the final boss of the Sister of the Void ending is Lost Lace. Which one counts depends on whether you mean the first major ending or the later continuation.
The Act 2 final boss: Grand Mother Silk
Hornet reaches Grand Mother Silk in the Cradle. The choice that matters comes after the fight, and it determines whether the story ends there or continues into Act 3.
Ending without the Soul Snare
If you have not taken the Soul Snare route, Hornet binds Grand Mother Silk’s power and becomes the Weaver Queen. This is the main Act 2 conclusion, and it is the outcome to point to when someone asks for the game’s first final boss.
#1 Best Overall
![Hollow Knight: Silksong Standard - Nintendo Switch [Digital Code]](https://m.media-amazon.com/images/I/51mOgOC8xEL._SL160_.jpg)
- Discover the fallen insect kingdom of Pharloom! Explore mossy grottos, gilded cities and misted moors as you ascend to the shining citadel at the top of the world.
- Engage in lethal acrobatic action! Wield a huge suite of deadly moves as you dance between foes in swift, beautiful combat.
- Craft powerful tools! Master an ever-expanding arsenal of weapons, traps, and mechanisms to vanquish your enemies and explore new heights.
- Solve shocking quests! Hunt down rare beasts and solve ancient mysteries to grant the wishes of the downtrodden and restore the kingdom’s hope.
- Face over 200 ferocious foes! Beasts and hunters, monsters and knights. Defeat them all with bravery and skill!
Continuing through the Soul Snare
If Hornet has completed the Silk and Soul quest, she can use the Needolin after the fight to activate the Soul Snare. This draws Grand Mother Silk toward the Void and opens the way into Act 3. The fight is the same in both cases; only the aftermath changes.
The Act 3 final boss: Lost Lace
In Act 3, Hornet reaches the Abyss and fights Lost Lace, who is under the Void’s influence. Defeating her loosens the Void’s hold on her. Grand Mother Silk then gives Hornet silk to escape the cocoon with Lace. This is the ending known as Sister of the Void, and Lost Lace is its final boss.
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- Hollow Knight: Silksong is the epic sequel to Hollow Knight, the award winning action-adventure.
- Journey to all-new lands, discover new powers, battle vast hordes of bugs and beasts and uncover secrets tied to your nature and your past.
Which answer fits your question
The table below lays out each route so you can match the boss to the ending you are asking about.
| Ending or route | Final boss | Where the fight takes place | What must happen first | What follows the fight |
|---|---|---|---|---|
| Main Act 2 conclusion (no Soul Snare) | Grand Mother Silk | The Cradle | Reach the Act 2 final fight | Hornet binds Grand Mother Silk’s power and becomes the Weaver Queen |
| Soul Snare continuation | Grand Mother Silk | The Cradle | Complete the Silk and Soul quest, then use the Needolin after the fight | The Soul Snare draws Grand Mother Silk toward the Void and opens Act 3 |
| Sister of the Void ending | Lost Lace | The Abyss | Unlock and complete Act 3 | Lace is freed from the Void’s hold, and Grand Mother Silk gives Hornet silk to escape the cocoon with her |
What the sources do and do not settle
The routes and their outcomes are well documented. The current game reference wiki and a PC Gamer route guide agree on the boss order and the Soul Snare requirement. Team Cherry’s official store description presents Silksong as Hornet’s adventure through Pharloom, and Steam lists its release date as September 4, 2025.
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- Classic side-scrolling action, with all the modern trimmings.
- Tightly tuned 2D controls. Dodge, dash and slash your way through even the most deadly adversaries.
- Explore a vast interconnected world of forgotten highways, overgrown wilds and ruined cities.
- Forge your own path! The world of Hallownest is expansive and open. Choose which paths you take, which enemies you face and find your own way forward.
- Evolve with powerful new skills and abilities! Gain spells, strength and speed. Leap to new heights on ethereal wings. Dash forward in a blazing flash. Blast foes with fiery Soul!.Equip Charms! Ancient relics that offer bizarre new powers and abilities. Choose your favourites and make your journey unique!.An enormous cast of cute and creepy characters all brought to life with traditional 2D frame-by-frame animation..
The sources do not establish a single canonical ending. Calling Grand Mother Silk the “true” final boss or Lost Lace the “real” one goes beyond what the route information supports. If you need one answer, match the wording of your question to the table: the first ending points to Grand Mother Silk, and the Act 3 continuation points to Lost Lace.
Quick Recap
Rank #4
![Hollow Knight - Nintendo Switch [Digital Code]](https://m.media-amazon.com/images/I/51nXCF+sf5L._SL160_.jpg)
- Classic side-scrolling action, with all the modern trimmings.
- Forge your own path! The world of Hallownest is expansive and open. Choose which paths you take, which enemies you face and find your own way forward.
- Evolve with powerful new skills and abilities! Gain spells, strength and speed. Leap to new heights on ethereal wings. Dash forward in a blazing flash. Blast foes with fiery Soul!
- Equip Charms! Ancient relics that offer bizarre new powers and abilities. Choose your favorites and make your journey unique!
- An enormous cast of cute and creepy characters all brought to life with traditional 2D frame-by-frame animation.
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