When you heal another Survivor for the equivalent of 1 Health State, Renewal activates:
The next time you are unhooked or unhook yourself, you suffer from the Broken Status Effect until Renewal deactivates.
You are automatically healed 1 Health State after 28/24/20 seconds.
While Renewal is active, the following conditions will deactivate it:

Successfully being healed by Renewal.
Being put into the Dying State before the timer elapses.
Renewal does not activate if you already suffer from the Broken Status Effect.

When you unhook a Survivor, the rescued Survivor benefits from the following effects for 4/6/8 seconds:

Scratch Marks and Pools of Blood are suppressed.
Additional 7 percent Haste Status Effect, boosting their Movement speed.
Guardian reveals the Killers Aura to you for 8 seconds.

When starting to run, break into a sprint at 150 percent of your normal Running Movement speed for 3 seconds.
Sprint Burst causes the Exhausted Status Effect for 60/50/40 seconds.
Sprint Burst cannot be used when Exhausted.

When you or the Obsession are injured, you both see each other's Auras.

After healing the Obsession or being healed by the Obsession, you both gain the Haste Status Effect, moving at an increased speed of 5/6/7 percent until you are no longer within 16 metres of each other.
If you are the Obsession, Blood Pact deactivates.
Lowers the odds of becoming the Killer's initial Obsession by -100 percent.

The Killer can only be obsessed with Survivor at a time.