I mentioned that Elazar currently has a sentient rock in his chest. Well…here it is!

Discovered by Elazar in Enacapa, an old dig site previously abandoned when the funding ran dry. The legends surrounding it claim it is the petrified core/essence of an elder god that died and fell to earth eons ago, eventually dug out of its rotting corpse by an ancient civilization and revered for its rejuvenating and healing properties.

Now that it's bonded to Elazar, it acts as a sort of nigh indestructible "backup drive" for his body and soul, resetting him at the moment right after his first death (which is why the scars he had previously don't heal). The more extensive the damage, the longer it will take to repair him, taking anywhere from a few minutes to several months. It won't heal non-fatal injuries, although it prevents Elazar from getting sick and aging like a normal person.

The Heart can relocate itself to a more ideal location when it is time to resurrect Elazar, crawling around on extendable limbs like a brittle star or, in rare cases, vibrating through solid matter. It doesn't always make the judgement for the benefit of its host and will occasionally respawn Elazar in dangerous positions that lead to him dying again (usually after the man hurls verbal abuse at it).