Sporg

Behaviour and Tactics
When in range, these mushrooms sprout from walls, ceilings and floors and spit out clusters of explosive spores (only one at a time), that slowly home in on The Knight. The spores explode on impact or after a short duration. If the Knight gets too close, they will retreat into the ground/wall and become invulnerable.

Keep an eye out for when the spore is about to detonate, as the explosion that follows deals 2 masks of damage in a wide area of effect.

As the Hunter's Journal entry mentions, it is possible to lure the spores back to them to kill them, but it is rather difficult to do so and attacking them with a ranged Spell or a Nail Art is much easier.

Locations
Спорень Sporg