Hollow Knight Silksong Hardest Bosses

Hollow Knight: Silksong is full of tricky encounters, but the bosses are where the real difficulty hits. Some fights are tests of speed, others drag on with multiple phases, and a few feel like punishment wrapped in silk. While most of Pharloom’s enemies are designed to push your skills, these bosses stand out as the hardest challenges in the game.

1. Lost Lace

Lost Lace is the ultimate test. She borrows Lace’s original move set, then layers void corruption on top of it. Her parries punish even the smallest mistake, her attacks strike for two masks, and her second phase forces you to fight in the air as the arena collapses. Healing windows are rare, and every hit feels like it could end the run. Beating her unlocks the true ending, making her as mandatory as she is brutal.

2. First Sinner

Speed defines the First Sinner. Her blades rain down in tight patterns that require split-second reads, while her teleport chains make the arena feel claustrophobic. She can even heal herself if you miss the cue to interrupt. Most players find this fight pushes them into pure reaction mode. Learning her rhythm feels like leveling up as a player, but getting there takes dozens of failed attempts.

3. Skarrsinger Karmelita

Karmelita is one of Silksong’s most controversial bosses. Her duel feels fair, but the pace is relentless. She mixes wide sweeping combos with silk-based traps, forcing you to stay aggressive while dodging her bind attacks. Many players call her the new Pure Vessel, with less randomness and more pressure. The fight feels like a dance, but one mistake can cost you everything.

4. Grandmother of Silk

The final story boss is an endurance marathon. She attacks from above with blades, laser webs, and falling debris that crowd the arena. Each phase stacks new hazards, with the last wave unleashing all of them at once. The fight demands focus more than raw aggression. Survival is about threading through tiny safe spots while finding rare openings to strike her exposed core.

5. Savage Beastfly (Lava Room Version)

The standard Savage Beastfly is tough enough, but the Lava Room version is infamous. Breakable floor tiles leave you stranded over lava, while summoned adds spit molten projectiles that double the chaos. Positioning becomes the real enemy, since one mistimed dodge means falling into instant punishment. This fight is less about reading attacks and more about staying calm in a crumbling arena.

6. Nyleth

Nyleth’s fight combines constant movement with environmental cruelty. Her projectile spreads and spike eruptions already fill the room, but once the central floor collapses you’re forced to cling to walls. Each wall she jumps to becomes spiked, forcing you to stay opposite. This battle leaves no margin for error and drags out longer than most, making fatigue as dangerous as her attacks.

7. Groal the Great

Groal the Great is hated for a reason. His arena is half leech water, his runback is a gauntlet of sewer enemies, and he spams summons mid-fight. His inhale move drags you in at the worst possible times, and phase two adds more projectiles just to keep you guessing. There are ways to cheese him with poison tools, but fighting him straight is one of the most exhausting parts of Silksong.

8. Trobbio

Trobbio turns his stage fight into sensory overload. Explosives, tornadoes, and fireworks fill the screen while he spins across the room in unpredictable patterns. Phase two adds fire jets from below, turning the battle into a vertical nightmare. His attacks are theatrical and chaotic, making it hard to stay locked in. Few bosses in Pharloom overwhelm your senses the way Trobbio does.

9. Widow

Widow is all speed and pressure. Her silk traps cut off movement, while her bell drops scatter damage across the arena. Once phase two begins, her attacks chain together with little downtime, punishing any attempt to heal. She’s one of the earliest major bosses to feel like a wall, especially for players still learning Silksong’s faster combat rhythm.

10. Raging Conchfly

The fight itself isn’t the worst on this list, but the runback makes it notorious. To rematch the Raging Conchfly, you must trek through a long gauntlet of traps before even entering the arena. Once inside, the small space and bouncing drill attacks create constant double-hit danger. Combined with the mental drain of repeated retries, this fight earns its spot among the hardest.

Final Blurb

The hardest bosses in Hollow Knight: Silksong go far beyond raw damage numbers. They test focus, patience, and the ability to adapt to arenas filled with traps and adds. Whether you’re facing the elegance of Karmelita, the spectacle of Trobbio, or the pure chaos of Lost Lace, these fights define Pharloom’s brutal charm. Mastering them is the difference between finishing the story and uncovering everything Silksong has hidden.