Deep Focus

Deep Focus
Naturally formed within a crystal over a long period. Draws in SOUL from the surrounding air. The bearer will focus SOUL at a slower rate, but the healing effect will double.
Effect	Focus heals 2 masks of Health while decreasing Focus speed by 65%
Notch Cost

Deep Focus is a Charm in Hollow Knight. It doubles the masks healed when using Focus but decreases Focus speed by 65%.

Usefulness

With Deep Focus, it takes ~1.470 seconds instead of ~0.891 seconds for a single focus without including the startup time (0.25 seconds). Startup time speed is not affected by Deep Focus.

Its restrictive cost and slow focus time make it hard to use in boss battles. It is better used in areas where there is lots of time to rest, such as while tackling difficult platforming challenges, where it shines in combination with Grubsong and Hiveblood.

How to Acquire

Found in Crystal Peak in a hidden cave made entirely of crystals.

Below the area where Cornifer can be found, look for a Husk Miner mining a wall. Break the wall to reveal the secret area. Requires Crystal Heart.

Deep Focus Location

Charm Interactions and Combo Tips

	Stalwart Shell Useful for guaranteeing a heal when enemies are attacking frequently.
	Quick Focus Despite costing a prohibitive 7 notches combined, Quick Focus partially cancels the focus-speed penalty of Deep Focus, allowing the Knight to heal two masks at almost the regular speed. Especially useful against swarms of enemies or enemies who deal two masks of damage per hit.
	Hiveblood Combined with Hiveblood, it greatly helps tackling difficult platforming challenges, especially the White Palace.
	Grubsong Combined with Grubsong, it greatly helps tackling difficult platforming challenges, especially the White Palace.
	Spore Shroom Increases the spore cloud radius by 35%.