Cast Living Death by paying ({3} magic symbol) ({B} magic symbol) ({B} magic symbol) .
Swarm Intelligence triggers, copying Living Death.
Resolve the copy of Living Death, exiling all creature cards in all graveyards, then causing each player to sacrifice all creatures they control, then putting all creatures exiled this way onto the battlefield.
Resolve Living Death, exiling all creature cards in all graveyards, then causing each player to sacrifice all creatures they control, then putting all creatures exiled this way onto the battlefield.
Ardent Elementalist, Priest of Gix, and Priest of Urabrask enter the battlefield, triggering their abilities.
Resolve the Priest of Gix trigger, adding ({B} magic symbol) ({B} magic symbol) ({B} magic symbol) .
Resolve the Priest of Urabrask trigger, adding ({R} magic symbol) ({R} magic symbol) ({R} magic symbol) .
Resolve the Ardent Elementalist trigger, returning Living Death from your graveyard to your hand.