Domains: Violence, pain, suffering.
Era of ascension: Lost Ages (~18,000 BSD). Cohort: current. Sainu rose during the prolonged hardship of the Lost Ages, when the collapse of Craggus's civilization left humanity without divine protection for millennia. His prayer pool does not require deliberate worship — every act of violence contributes.
Worshipped by: Pain cults, certain berserker warrior traditions, and those who make violence their art. No major culture openly endorses his worship, but hidden shrines to Sainu exist in most militaristic societies. (The worships edge is authored downstream on the worshipper, not here.)
Sainu is one of the more stable daemons on the roster: his domains are reliably fed so long as living beings harm each other. He does not need missionaries or temples. He requires only that war, cruelty, and suffering continue — a condition that has never failed to hold.