How to unlock extra Tool Slot in Hollow Knight Silksong

Expanding Hornet's inventory is crucial for conquering the challenges of Pharloom. Gaining an additional Tool Slot significantly increases your combat flexibility, allowing you to equip more vital tools simultaneously. This guide provides a complete, step-by-step walkthrough to find this key upgrade by mastering the game's Crest system and uncovering a hidden location.

The Importance of Crests for Progression

In Hollow Knight: Silksong, your progression is deeply tied to the collection and enhancement of Crests. These emblems represent Hornet's growing strength and are the absolute prerequisite for unlocking bonus features, including extra Tool Slots. Simply collecting them is not enough; you must fully upgrade each one through their individual progression paths.
The seven core Crests you need to find and upgrade are:

• Hunter Crest
• Wanderer Crest
• Reaper Crest
• Beast Crest
• Witch Crest
• Shaman Crest
• Architect Crest

As you strengthen these Crests, you will gradually unlock the left-side menu slots in your inventory. This is the system that governs the coveted extra Tool Slot reward.

Step 1: Locate the Entrance to Weavenest Atla

Once your Crests are empowered, your journey leads to a secluded area knownas the Weavenest Atla. The entrance is hidden within the Moss Grotto during Act 1. You will likely pass by a prominent sealed door early on that is inaccessible.

To unseal this door, you must first:

Defeat the Widow Boss: Progress through the Bellhart region until you confront and defeat the boss known as the Widow.

Acquire the Needolin Ability: This key ability, also earned during your conquest of Bellhart, grantsHornet the power to break through certain seals and barriers.

After obtaining the Needolin, return to the sealed door in Moss Grotto anduse your new ability to gain entry to the Weavenest Atla.

Step 2: Navigate the Weavenest Atla

The Atla is a puzzle-filled environment. Upon entering, proceed to theright until you discover a large central chamber. Here, you will find two levers mounted on the ceiling. Use your weapon to strike both levers to activate a central mechanism.This action unlocks the area's map and changes the layout, grantingfurther access.

Next, backtrack to an elevator shaft you passed and ride it down to a lower level. This path is lined with breakable walls. Clever use of your tools and attacks is needed to clear the pathforward. Continue exploring to the right until you eventually discoverthe chamber of a crucial character.

Step 3: Meet Eva and Claim Your Reward

At the end of your path, you will meet Eva, an NPC dedicated to crest evolution and enhancement. Speaking to herwith a fully upgraded Hunter's Crest will allow you to perform a crestevolution.

This evolution is the final key. As a reward for this act, you will immediately be granted an extra Tool Slot, which appears on the left-hand side of your inventory screen. Evaserves as a permanent upgrade hub; returning to her after further weapon upgrades, quest completion, or leveling up will provide opportunitiesfor additional crest evolutions and slot unlocks throughout your entireplaythrough.

This guide is based on available preview information and will be updated with precise details upon the game's full release.

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