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 Yarok, creating two artifact tokens.
Activate Clock of Omens by tapping the artifact tokens, untapping Hearthhull.
Repeat.
This engine turns land sacrifice into a self-sustaining loop by leveraging Hearthhull, the Worldseed as both a sacrifice outlet and a lethal payoff when its station ability activates its damage trigger. Clock of Omens acts as the mechanical engine, allowing you to untap Hearthhull using the artifact tokens generated by Tireless Tracker, whose landfall triggers are doubled by Yarok, the Desecrated for maximum value. Meanwhile, the Walk-In Closet // Forgotten Cellar enchantment ensures the sacrificed land can be immediately replayed from your graveyard, keeping the loop going indefinitely until your opponents are drained of all their life.