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 Fractured Realm, creating two artifact tokens.
Activate Clock of Omens by tapping the artifact tokens, untapping Hearthhull.
Repeat.
This clever loop transforms land sacrifice into a devastating engine by combining Hearthhull, the Worldseed with recursive land plays and artifact untapping. Perennial Behemoth lets you repeatedly pull sacrificed lands straight out of your graveyard, while Tireless Provisioner generates artifact tokens whenever those lands re-enter the battlefield—an output beautifully doubled by the passive duplication effects of Fractured Realm (the second half of Mirror Room // Fractured Realm). You then feed those fresh tokens into Clock of Omens to untap Hearthhull, resetting its ability so you can sacrifice another land, draw cards, and drain your opponents' life totals over and over again.