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 Elesh Norn, creating two artifact tokens.
Activate Clock of Omens by tapping the artifact tokens, untapping Hearthhull.
Repeat.
This intricate engine transforms your land drops into a relentless loop of card draw and artifact generation. It all kicks off by leveraging Hearthhull, the Worldseed to sacrifice a land for cards and extra land drops, which you can immediately replay thanks to Crucible of Worlds. Each time a land enters, Tireless Provisioner triggers twice due to Elesh Norn, Mother of Machines, generously flooding your board with Treasure and Food tokens. Those newly created artifacts then feed directly into Clock of Omens, letting you untap Hearthhull so you can repeat the sacrifice entirely at whim. Finally, once Hearthhull has accumulated eight or more charge counters and transformed into an artifact creature, every sacrificed land drains your opponents' life away until nothing is left.