Activate Mary Read and Anne Bonny by tapping it, causing you to draw a card and discard Gilded Assault Cart.
Mary Read and Anne Bonny triggers, creating two tapped Treasure tokens.
When the Treasures enter the battlefield, Skyswimmer Koi triggers twice.
Resolve the first trigger, choosing not to draw a card.
Holding priority, activate Gilded Assault Cart by sacrificing two Treasures, returning Gilded Assault Cart from your graveyard to your hand.
Resolve the second Skyswimmer Koi trigger, causing you to draw a card and discard Gilded Assault Cart.
Repeat from step 2.

Infinite card draw

Infinite self-discard triggers

Infinite draw triggers

Infinite looting

Near-infinite tapped Treasure tokens

Mary Read and Anne Bonny

Gilded Assault Cart

Xorn

Skyswimmer Koi

Activate Mary Read and Anne Bonny by tapping it, causing you to draw a card and then discard an Island, Pirate or Vehicle card.
The discarded card is put on top of your library instead of into your graveyard due to Library of Leng.
Mary Read and Anne Bonny triggers, creating a tapped Treasure token.
When the Treasure enters the battlefield, Skyswimmer Koi triggers, causing you to draw a card and then discard an Island, Pirate or Vehicle card.
Repeat from step 2.

Infinite tapped Treasure tokens

Library of Leng

Cast Sensei's Divining Top by paying {1}.
When Sensei's Divining Top enters, Skyswimmer Koi triggers.
Holding priority, activate Sensei's Divining Top's second ability by tapping it, causing you to draw a card and put Sensei's Divining Top from the battlefield onto the top of your library.
Wan Shi Tong's second ability triggers, creating two 1/1 Spirit creature tokens.
Resolve the Skyswimmer Koi trigger, causing you to draw Sensei's Diving Top and then discard any card that isn't Sensei's Divining Top.
Activate Ashnod's Altar by sacrificing a Spirit, adding {C}{C}.
Repeat.

Near-infinite ETB

Near-infinite storm count

Near-infinite LTB

Near-infinite death triggers

Near-infinite sacrifice triggers

Near-infinite colorless mana

Near-infinite creature tokens

Wan Shi Tong, All-Knowing

Sensei's Divining Top

Ashnod's Altar

Put a +1/+1 counter on a creature you control.
Moss-Pit Skeleton triggers, putting it from your graveyard onto the top of your library.
Kheru Goldkeeper triggers, creating a Treasure token.
When the Treasure enters the battlefield, Skyswimmer Koi and Cloakwood Swarmkeeper trigger.
Resolve the Skyswimmer Koi trigger, drawing Moss-Pit Skeleton from your library, and then discarding it.
Resolve the Cloakwood Swarmkeeper trigger, putting a +1/+1 counter on it.
Repeat from step 2.

Infinite ETB

Infinite colored mana

Infinite Treasure tokens

Infinite +1/+1 counters on a creature

Moss-Pit Skeleton

Kheru Goldkeeper

Cloakwood Swarmkeeper

Put a +1/+1 counter on a creature you control.
Moss-Pit Skeleton triggers, putting it from your graveyard onto the top of your library.
Chalk Outline triggers, creating a 2/2 Detective creature token and a Clue token.
When the Clue and Detective enter the battlefield, Skyswimmer Koi and Cloakwood Swarmkeeper trigger.
Resolve the Skyswimmer Koi trigger, drawing Moss-Pit Skeleton from your library, and then discarding it.
Resolve the Cloakwood Swarmkeeper trigger, putting a +1/+1 counter on it.
Repeat from step 2.

Infinite creature tokens

Infinite Clue tokens

Chalk Outline

Combos with "Skyswimmer Koi"