Shade Soul

Shade Soul is a Spell in Hollow Knight. It is the upgrade to Vengeful Spirit. Using it conjures a shadow that flies forward and damages enemies.

Function
Press FOCUS/CAST or QUICK CAST without holding UP or DOWN to launch a projectile that passes through enemies and deals damage. The projectile now moves 12.5% faster and penetrates all objects in its path including walls and invulnerable parts of enemies, such as shields and shells, but does not damage a fully protected enemy.

Modifiers
 * Flukenest turns the Shade Soul into a horde of black baby flukes that bounce around dealing damage.
 * When Flukenest is combined with Defender's Crest, it launches a single large fluke that explodes into a damage-dealing cloud of gas.
 * Shaman Stone increases the width of the projectile and increases the damage dealt by 33%.
 * Spell Twister lowers the SOUL cost to cast Shade Soul to 24 SOUL.

How to Acquire
Requires purchasing the Elegant Key from Sly in Dirtmouth after obtaining the Shopkeeper's Key.

The Spell is located behind a locked door in Soul Sanctum within the City of Tears. Requires defeating a Soul Warrior that continuously spawns Follies.

Trivia

 * There is an unused version of Shade Soul that consists of a mixture between a black Shade Soul and a white Vengeful Spirit much like how Abyss Shriek combines black souls with white Howling Wraiths.
 * Shade Soul is obtained from a snail shaman linked to some kind of machine.

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