Grist, Voracious Larva // Grist, the Plague Swarm, Hidden Herbalists, Doubling Season, Body Launderer, and Bartolomé del Presidio Combo

Prerequisites

Activate Bartolomé del Presidio by sacrificing Body Launderer
When Body Launderer dies, its second ability triggers, returning Grist, Voracious Larva from your graveyard to the battlefield
When Grist, Voracious Larva enters the battlefield, it triggers, causing you to pay to exile it and return it to the battlefield as Grist, the Plague Swarm with six loyalty counters due to Doubling Season
Resolve the Bartolomé del Presidio ability, putting a +1/+1 counter on it
Activate Grist, the Plague Swarm's third loyalty ability by removing six loyalty counters from it
Grist, the Plague Swarm is put into your graveyard as a state-based action due to having zero loyalty
Resolve the Grist, the Plague Swarm ability, creating two token copies of each creature card in your graveyard that are 1/1 Insects
Put all but one of the Grist, Voracious Larva tokens into your graveyard due to the legend rule
When the Grist, Voracious Larva and Hidden Herbalist tokens enter the battlefield, each Hidden Herbalist token triggers once and each Grist, Voracious Larva token triggers for each token created this way
Resolve all Grist, Voracious Larva triggers, choosing not to pay
Resolve both Hidden Herbalist triggers, adding
Activate Bartolomé del Presidio by sacrificing the Grist, Voracious Larva token, putting a +1/+1 counter on Bartolomé del Presidio
Repeat from step 1, sacrificing a Body Launderer token instead