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 Tracker triggers twice due to Roaming Throne, creating two artifact tokens.
Activate Clock of Omens by tapping the artifact tokens, untapping Hearthhull.
Repeat.
This engine transforms land sacrifice into a closed-loop mechanical marvel, powered by Hearthhull, the Worldseed's sacrifice outlet to draw cards and drain your opponents' life totals. To keep the gears turning, Walk-In Closet // Forgotten Cellar allows you to continually replay those sacrificed lands straight from your graveyard, fueling Tireless Tracker to drop fresh artifact tokens upon entry. Those very tokens are then put to work by Clock of Omens, tapping themselves to untap Hearthhull and reset the entire cycle. Meanwhile, Roaming Throne ensures that your triggered abilities double up, maximizing the output of your landfall triggers and locking down a near-infinite loop of card draw and life loss.