Tartaros Signet

{1}, {t}: Add {b}{r} to your mana pool.
{t}: Add two mana of any combination of colors
to your mana pool. Spend this mana only to cast
Demon creature spells.
"I've heard stories from people claiming to have
stumbled upon their gatherings. And all of them
came to the exact same conclusion. That Tartaros
rituals are for worshipping demons." - Warrod Sequen