As for why it was charred black, that was also part of the original Rakshasa God's personal interior design for their own temple.
Using the eyeballs of ancient giant beasts as stars in the sky above the temple—every single one of them blinking open whenever someone walked past—was an aesthetic truly in a league of its own.
Inscribed in large characters before the grand gates of the Rakshasa Temple were several lines of text:
Chapter 1305