Imagine the Impossibly Miniscule Organ immolated on some brutalist shrine.. it could be glorious.
I love the idea of a brutalist shrine, like somehow some kind of devolved ritual modernist cult.
Perhaps not the most brutalist, but first thing I thought of was the enemy base in Hundred Line Last Defense Academy.
But the IMO is actually a quantum planet, so the sacrifice would be billons of deaths for your sick pleasure!!