Silk

Silk is Hornet's source of energy in Hollow Knight: Silksong, and is similar to SOUL which the Knight uses in Hollow Knight.

In-game Silk is represented on the HUD by a bar with several notches.

Usage Silk can be used to Bind, quickly healing one Mask of damage for each set of 4 notches of Silk.

Hornet can use 2 notches of Silk to grapple onto a piece of the environment or thin air, travelling to that location. This ability can also be used on an enemy, damaging them as well. Hitting an enemy with this ability restores 2 notches of Silk.

She can use 3 notches of Silk to use Gossamer Storm, an attack that damages all enemies in an area of effect centred on Hornet. This is similar to the effect of the Thorns of Agony Charm in Hollow Knight. This attack restores Silk as usual.

Hornet can use 5 notches of Silk to attach a string to her Needle, throwing it and pulling it back quickly. No silk is restored when hit.

Hornet can also perform a taunt, similar to what she does at the start of her boss battles in Hollow Knight. This causes Silk to appear around her but does not use any Silk.

Acquiring Silk Attacking Enemies Enemies struck with the Needle cause Hornet to gain Silk at a rate of 1-2 notches per hit.

Hornet can find Spindles of Silk across all of Pharloom. They grant her Silk each time they are struck until they run out, similar to Hollow Knight's Soul Totems.

Hornet starts out with several notches of Silk. The maximum number of notches is 15.