So the idea is a spell that condenses nearby life essence wraps it around you. That would cause you blend in with the area, so to speak. The room you're in no longer spawns living creatures based on your character (think 1-person sanctuary, they can't sense you). Constructs would spawn at a normal rate. Undead would see your life bubble as a beacon and spawn at 2x the rate.

Potentially, it could buff stealth/thievery and make it so you couldn't be perceived with perceive health. There could be an intuition type tie in.

The idea is that this is a way for empaths to control the creature count while hunting/gathering, and even while healing. They could hunt more easily in mixed area zones (such as gargs + snowbeasts). You could extend this to a group in a way that innocence won't, and you could heal someone in combat without swarming them unintentionally. It would also buff survivals that empaths probably use as a primary defense.