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, Eusocial Engineering triggers twice due to Starfield Vocalist, creating two artifact tokens.
Activate Clock of Omens by tapping the artifact tokens, untapping Hearthhull.
Repeat.
This clever engine spins up by leveraging Hearthhull, the Worldseed as a sacrifice outlet that feeds you cards and extra land drops, while its built-in drain trigger eventually closes out the game. Perennial Behemoth keeps the loop supplied by allowing you to constantly replay those sacrificed lands right from your graveyard. Every time a land touches down, Eusocial Engineering fires off robot tokens, but it's Starfield Vocalist that doubles those triggers to efficiently generate a pair of artifacts. Finally, Clock of Omens uses those newly minted tokens to untap Hearthhull, creating a perpetual motion machine of card draw, land recycling, and life loss.