The core of Light and Darkness. The core of Fire and Water. And finally, the prize they had paid for in blood during an escape none of them would ever forget: the core of Wind and Earth.
A brief, analytical curiosity drifted through Ren's mind as he mentally listed the elements. He wondered why Wood, a primary, foundational element, didn't figure into the door's requirements.
He had no way of researching it right now…
Perhaps, once the vault opened, the ancient architecture inside the ruin would offer some clues. He filed the anomaly away alongside his other unanswered questions.
They already knew, in broad strokes, what to expect on the other side.
If this ruin mirrored the architecture of the one in Yino's southeast, then waiting behind this door would be another "brain", a big, impossibly complex crystal formation.
