Activate Cauldron Familiar by sacrificing Sword of the Meek, which is a Food due to Ragost, returning Cauldron Familiar from your graveyard to the battlefield.
When Cauldron Familiar enters, it and Sword of the Meek trigger.
Resolve the Cauldron Familiar trigger, causing each opponent to lose 1 life and you to gain 1 life.
Resolve the Sword of the Meek trigger, returning it from your graveyard to the battlefield attached to Cauldron Familiar.
Activate Umbral Collar Zealot by sacrificing Cauldron Familiar.
Repeat.
This recursive loop transforms your battlefield into a lethal, self-sustaining engine by turning every piece into interchangeable fodder. Ragost, Deft Gastronaut is the linchpin of the transformation, magically converting Sword of the Meek into a Food that can be freely fed to Cauldron Familiar. Every time Cauldron Familiar dives into the graveyard and returns, its revival triggers Sword of the Meek to leap out of the graveyard and equip itself, creating the 1/1 creature needed to fuel the cycle all over again. Meanwhile, Umbral Collar Zealot stands ready to sacrifice the Familiar when you need to dig deeper into your library via surveil, keeping your graveyard stocked and your triggers infinite.