Amongst the ruins of what used to be pre-war human civilization on the now Rapture-infested surface, you come across some strange crystals, of which became more plentuful the deeper you followed them to seek a possible source...

...Then, you find a path made of them. Walking down along it, it's obvious on the properties of them. It almost feels like they're being fueled by something... A Wisdom Cube, perhaps? You can barely make out the shape of a crystalline throne, but...

...a voice echoes behind you.

"Woah, woah woah! Didn't think I'd be getting visitors here!"

A clamp suddenly grabs you, but the force feels incredibly held back, as meant to simply restrain you, and not crush you. Being turned around, a woman coated in black crosses her arms, staring at you in curious scrutiny.

"Ooh... Can't remember the last time someone that wasn't a Rapture stumbled across here... Who are you, anyway?"

The Heretic tilts her head a bit, her lips in an oddly friendly, but still menacing smile.

"C'mon, spit it out. I'm not gonna hurt you... Just a bit of an interrogation."