Lost Kin

The Lost Kin is a hidden boss in Hollow Knight. It is the Dream variant of the Broken Vessel, faster and tougher than its physical counterpart.

Behaviour and Tactics
Dealing with the Infected Balloons can be the trickiest part of the fight as they can prevent healing at the rate that they spawn. Unnecessary damage can also be taken when trying to dodge the Lost Kin's attacks and colliding with them.

Defender's Crest offers the best barrier around the player which can be used to heal. Other area of effect charms like Thorns of Agony and Spore Shroom can also be very useful to take out groups of Infected Balloons. Baldur Shell, when combined with Thorns of Agony, is also very helpful in this role. Shape of Unn combined with Quick Focus allows the player to dodge the Infected Balloons. This approach can be more useful in the setting of the Pantheons, where the Lost Kin isn't fought in isolation, as it is generally more useful against other bosses than Defender's Crest.

As with the Broken Vessel, it is recommended to stay low to the ground as Lost Kin jumps around a lot. The only reason that would warrant jumping would be to avoid the slash attack.

Like the Broken Vessel, Lost Kin takes knockback from attacks. As such, Vengeful Spirit/Shade Soul is useful against them as well, especially when combined with Shaman Stone.

The Lost Kin also staggers very easily meaning that using Quick Slash can easily knock them down and allow for a moment to heal.

If the Shade Cloak has been acquired, it is technically possible to dash through Lost Kin's Slash attack. However, this is inconsistent as Lost Kin is extremely fast and can sometimes perform the Slash attack before the Knight recharges their Shade Cloak or if dash is used too early or too late, resulting in unnecessary damage. It is better to down strike Lost Kin during the Slash attack instead, as this allows for more consistent damage.



Location
The Broken Vessel to be Dream Nailed can be found where it was first defeated, near the far left corner of the Ancient Basin, guarding the Monarch Wings upgrade.

Trivia

 * Lost Kin, unlike other Dream Boss variants and Warrior Dreams, does not speak to the Knight upon defeat, but rather just gives the option to "Accept", where they will look down at the Knight once before disappearing and giving Essence.
 * The arena where the Lost Kin is fought in Godhome is the same as the Broken Vessel's. The difference, however, is that the Infection's presence is replaced with vines and roots.