Living Death by paying ({3} magic symbol) ({B} magic symbol) ({B} magic symbol) , holding priority.
Cast
Naru Meha by paying ({2} magic symbol) ({U} magic symbol) ({U} magic symbol) .
Naru Meha's ETB ability triggers, targeting
Living Death.
Activate
Viscera Seer once for each creature you control by sacrificing that creature.
Resolve all
Viscera Seer abilities, scrying 1 for each one.
Resolve
Naru Meha's ability, copying
Living Death.
Resolve the
Living Death copy, causing each player to exile all creature cards from their graveyard, sacrifice all creatures they control, then put the exiled cards onto the battlefield.