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How to Get Volt Filament in Hollow Knight: Silksong

Grab Hollow Knight: Silksong's Volt Filament in the Sands of Karak—unlock Silk Soar, beat Voltvyrm, and claim this Act 3 tool.

I’ve been tearing through Hollow Knight: Silksong in 2026, and I’ve got to say—Volt Filament is one of those tools that is easy to overlook but absolutely worth the detour. It’s an Act 3 tool, so you can’t grab it in the early game even if you’re feeling like a speedrunner on a hot streak. You need a specific ability first, and you need to know exactly where to poke around in the Sands of Karak. Let me break it all down, step by step, so you don’t wander around like a headless bug.

Silk Soar Is the Make-or-Break Skill

Let’s cut to the chase: you cannot reach Volt Filament without Silk Soar. This Super Jump skill is your golden ticket to the hidden area. If you show up without it, you’ll be staring at a ledge like a lost tourist—don’t bother. Make sure you’ve unlocked Silk Soar before heading out, because trying to reach the Voltnest without it is like trying to chop wood with a spoon. Pointless and a little embarrassing.

How to Unlock the Sands of Karak Shortcut

If Sands of Karak is still greyed out on your map, head to the west of Blasted Steps to enter the region for the first time. Once you’re inside, look for a shortcut right above Blasted Steps’ Bellway. Open that shortcut, because you’ll be bouncing back and forth, and the long way around is a real time sink. Trust me, your future self will thank you.

Reaching the Voltnest

From Blasted Steps’ Bellway, teleport and climb up to Sands of Karak. If you didn’t unlock the bridge shortcut on top of the region, you’ll have to take the long road to the right and circle back on top of the bridge to create the shortcut. Save yourself the headache—do it now. When you get to the bridge, trigger Silk Soar and you’ll pop right into the Voltnest. That’s where the real fun begins.

Voltvyrm Boss Breakdown: Don’t Panic

Okay, let me be real with you: Voltvyrm is aggressive. The whole Voltnest is packed with electrical attacks that will fry you if you get greedy. Voltvyrm keeps coming at Hornet, and the damage can feel rough. But here’s the kicker—this boss is a glass cannon. Every time you land a hit, it retreats to another spot. It dies faster than most bosses, so your job is to avoid attacks and keep the pressure on.

I found that the best approach is to bring auto-attacking tools like the Wispfire Lantern or Cogfly. Let them chip away while you focus on dodging. It’s not the flashiest strategy, but it works like a charm. Hit, retreat, repeat. Don’t be a hero and try to trade blows; Voltvyrm’s electrical barrages will punish you for it.

What Volt Filament Actually Does

Once Voltvyrm goes down, you’ll snag the Volt Filament tool. It increases the damage of Silk abilities and makes them electrical—pretty solid on its own. But if you really want to max out the benefit, slap it on the Shaman crest. That crest has three Silk abilities, so the electrical boost triggers across the board. It’s a match made in heaven, or at least in Pharloom.

Here’s a quick breakdown of how I’d rate the synergetic loadouts:

Loadout
Synergy Level
Reason

Volt Filament + Shaman Crest
High
Three Silk abilities benefit from the electrical boost

Volt Filament + Wispfire Lantern
Medium
Good damage support, but less direct Silk synergy

Volt Filament + Cogfly
Medium
Auto-attacks complement the tool, but not max synergy

Final Take

Volt Filament is not the kind of tool that will completely rewrite your whole build, but it’s a dang good pickup for Act 3. The path to it is a little sneaky, and Voltvyrm might give you a scare, but once you know the route it’s a piece of cake. Open the shortcuts, pack an auto-attacker, and don’t sleep on that Shaman crest combo. Happy hunting, and keep your eyes peeled for those hidden ledges—Silksong loves to hide the good stuff.

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