Kaya's Ghostform attached to Shepherd of the Cosmos.
Steps
Activate Viscera Seer by sacrificing Shepherd of the Cosmos.
When Shepherd of the Cosmos dies, Kaya's Ghostform triggers, returning Shepherd of the Cosmos from your graveyard to the battlefield.
When Shepherd of the Cosmos enters the battlefield, it triggers, returning Kaya's Ghostform from your graveyard to the battlefield attached to Shepherd of the Cosmos.
Resolve the Viscera Seer ability, causing you to scry 1.