Activate Goblin Bombardment by sacrificing the persist creature.
When the persist creature dies, it and Harvester of Souls trigger.
Resolve the Harvester of Souls trigger, causing you to draw a card.
Resolve the persist creature's trigger, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
When the persist creature enters the battlefield, Olivia triggers, putting a +1/+1 counter on the persist creature and causing you to discard a card.
Resolve the Goblin Bombardment ability.
Repeat.

Near-infinite damage

Near-infinite ETB

Infinite draw triggers

Infinite looting

Near-infinite LTB

Near-infinite death triggers

Near infinite sacrifice triggers

Infinite self-discard triggers

Persist Creature

Olivia, Mobilized for War

Goblin Bombardment

Harvester of Souls

Cast Endless One by paying {0}.
Endless One enters and dies as a state-based action due to having 0 toughness, triggering Mortuary and Harvester of Souls.
Resolve the Mortuary trigger, putting Endless One from your graveyard onto the top of your library.
Resolve the Harvester of Souls trigger, causing you to draw a card, thus drawing Endless One from your library.
Repeat.

Infinite LTB

Infinite ETB

Infinite death triggers

Infinite storm count

Mortuary

Endless One

Activate Soldevi Adnate by tapping it and sacrificing Golgari Thug, adding {B}{B}.
Soldevi Adnate, Golgari Thug, and Harvester of Souls trigger.
Resolve the Soldevi Adnate trigger, untapping it.
Resolve the Golgari Thug trigger, putting it from your graveyard on top of your library.
Resolve the Harvester of Souls trigger, drawing Golgari Thug from your library.
Cast Golgari Thug by paying {1}{B}.
Repeat.

Infinite sacrifice triggers

Infinite self-mill

Soldevi Adnate

Thornbite Staff

Golgari Thug

Activate Phyrexian Altar by sacrificing Golgari Thug, adding {B}.
When Golgari Thug dies, it and Harvester of Souls trigger.
Resolve the Golgari Thug trigger, returning it from your graveyard to the top of your library.
Wan Shi Tong's second ability triggers, creating two 1/1 Spirit creature tokens.
Resolve the Harvester of Souls trigger, causing you to draw Golgari Thug from your library.
Activate Phyrexian Altar by sacrificing a Spirit, adding {1}.
Cast Golgari Thug by paying {1}{B}.
Repeat.

Infinite colored mana

Infinite creature tokens

Wan Shi Tong, All-Knowing

Phyrexian Altar

Activate Phyrexian Altar by sacrificing Forsaken Miner, adding {B}.
When Forsaken Miner dies, Harvester of Souls triggers, causing you to draw a card.
Lyla triggers, targeting a creature an opponent controls.
Forsaken Miner triggers, causing you to pay {B} to return Forsaken Miner from your graveyard to the battlefield.
Resolve the Lyla trigger.
Repeat.

Infinite card draw

Near-infinite sacrifice triggers

Lyla, Holographic Assistant

Forsaken Miner

Combos with "Harvester of Souls"