Activate Hearthhull by paying 1, tapping it and sacrificing a land.
If Hearthhull has eight or more charge counters on it, it triggers, causing each opponent to lose 2 life.
Resolve the Hearthhull ability, causing you to draw two cards and allowing you to play an additional land this turn.
Play the land from your graveyard.
When the land enters the battlefield, Tireless Provisioner triggers twice due to Roaming Throne, creating two artifact tokens.
Activate Clock of Omens by tapping the artifact tokens, untapping Hearthhull.
Repeat.
This intricate engine transforms simple land drops into an unstoppable loop by turning Hearthhull, the Worldseed into a self-sustaining sacrifice outlet. By activating Hearthhull to sacrifice a land and draw cards, you feed the land straight back into play through Walk-In Closet // Forgotten Cellar, whose ability lets you continuously replay lands from your graveyard. Each returning land triggers Tireless Provisioner, and with Roaming Throne doubling those landfall triggers, you are flooded with a surplus of artifact tokens. Clock of Omens then uses those freshly minted artifacts to untap Hearthhull, resetting the cycle while Hearthhull's own triggered ability drains your opponents' life total to zero.