All Slab Key Locations in Hollow Knight Silksong – How to Find Every Key

The Slab Keys in Hollow Knight Silksong are crucial items that allow you to unlock new sections of The Slab and complete key quests tied to the area. Players may first encounter The Slab during Act 1, when Hornet is kidnapped by the jailers. If not, it can also be accessed later in the game, northeast of Mount Fay or through alternate map routes.

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There are three Slab Keys in total: the Key of Apostate, the Key of Indolent, and the Key of Heretic. Here’s a breakdown of where to find each one.

1. Key of Apostate Location

• Begin from the upper section of Bilewater.
• Use wall-climbing to reach the higher platform above Bilewater, where several hidden passages can be found.
• Head to the top-left hidden passage and continue until you reach a gap. Jump across to access the next corridor.
• At the dead end, you’ll find the Key of Apostate hidden inside a shell. Strike the shell twice to break it and claim the key.

2. Key of Indolent Location

• Start from the top vertical section of Mount Fay.
• Move left until you see a small vertical passage. Climb through it to reach the upper left section. Be cautious of traps along the way.
• Use wall-climbing to scale a vertical passage and arrive at The Slab.
• From here, use the platforms to reach the left passage, leading into a snowy environment.
• Jump down carefully and spot a passage just below your entry point. Move through until you reach a dead end with a downward path.
• Descend fully to the ground, then head left to find the Slab Key attached to a metal chain. Strike the chain once to drop it.

        Watch out for two enemies nearby—they can make this retrieval tricky.

3. Key of Heretic Location

• Begin at the Bench in the upper section of The Slab.
• Move right until you find a lower vertical passage leading downward.
• From there, head left until you reach a locked gate with a “Descend” prompt. Open it to continue.
• You’ll enter the lower base, where multiple enemies await. Defeat them, and one will drop the Key of Heretic.

Collecting all three Slab Keys in Hollow Knight Silksong is essential for unlocking new regions and progressing deeper into the game’s lore. Each key requires careful navigation, platforming skills, and in some cases, tough combat encounters. Make sure you’re prepared before venturing into these areas.

With the Key of Apostate, Key of Indolent, and Key of Heretic secured, you’ll have everything you need to explore The Slab fully and uncover its secrets.