Grubsong

Grubsong is a Charm in Hollow Knight. It causes the Knight to gain 15 SOUL when taking damage.

Usefulness A useful Charm at the cost of only one Notch as it provides a good amount of SOUL meter to use as healing in compensation for taking damage. The SOUL provided per hit is not enough for a heal on its own but combined with the SOUL gathered by striking enemies, or with other Charms that help gather SOUL faster, this Charm becomes incredibly useful for a Spell-focused build.

It also shines in difficult platforming areas where enemies are not readily available for gathering SOUL.

How to Acquire Gifted by the Grubfather after 10 Grubs have been freed.

Trivia
 * The amount of Mask damage taken in one hit does not impact the amount of SOUL gained, as it always grant 15 SOUL (25 with Grubberfly's Elegy).

Песня гусеничек Canción de larvas Chant des larves Pieśń Pędraków