Cast Gemcutter Buccaneer by pying {3}{R}.
When Gemcutter Buccaneer enters the battlefield, it triggers, creating a tapped Treasure artifact token.
The Treasure enters the battlefield as a 0/0 creature with all creature types due to March of the Machines and Maskwood Nexus, causing it to die as a state-based action due to having 0 toughness.
Gemcutter Buccaneer triggers, creating a Treasure artifact token.
Repeat from step 3.
NOTE: This combo creates a mandatory infinite loop that will draw the game if it isn't interacted with.

Draw the game

Infinite death triggers

Infinite ETB

Infinite LTB

March of the Machines

Maskwood Nexus

Gemcutter Buccaneer

Cast Gemcutter Buccaneer by paying {3}{R}.
When Gemcutter Buccaneer enters the battlefield, it triggers, creating a tapped 2/2 Cat or 3/1 Dog creature token due to Jinnie Fay.
When the Cat or Dog enters the battlefield as a Pirate due to Maskwood Nexus, Gemcutter Buccaneer triggers, creating a tapped 2/2 Cat or 3/1 Dog creature token due to Jinnie Fay.
Repeat step 3.

Infinite tapped creature tokens

Jinnie Fay, Jetmir's Second

Activate Sliver Queen by paying {2}, creating a 1/1 Sliver creature token.
When the Sliver enters the battlefield as a Pirate due to Maskwood Nexus, Gemcutter Buccaneer triggers, creating a tapped Treasure token.
Activate Krark-Clan Ironworks by sacrificing the Treasure, adding {C}{C}.
Repeat.

Infinite creature tokens

Sliver Queen

Krark-Clan Ironworks

Activate Sliver Queen by paying {2}, creating a 1/1 Sliver creature token.
When the Sliver enters the battlefield as a Pirate due to Arcane Adaptation, Gemcutter Buccaneer triggers, creating a tapped Treasure token.
Activate Krark-Clan Ironworks by sacrificing the Treasure, adding {C}{C}.
Repeat.

Arcane Adaptation

Activate Sliver Queen by paying {2}, creating a 1/1 Sliver creature token.
When the Sliver enters the battlefield as a Pirate due to Xenograft, Gemcutter Buccaneer triggers, creating a tapped Treasure token.
Activate Krark-Clan Ironworks by sacrificing the Treasure, adding {C}{C}.
Repeat.

Xenograft

Activate Sliver Queen by paying {2}, creating a 1/1 Sliver creature token.
When the Sliver enters the battlefield as a Pirate due to Conspiracy, Gemcutter Buccaneer triggers, creating a tapped Treasure token.
Activate Krark-Clan Ironworks by sacrificing the Treasure, adding {C}{C}.
Repeat.

Conspiracy

Activate Sliver Queen by paying {2}, creating a 1/1 Sliver creature token.
When the Sliver enters the battlefield as a Pirate due to Rukarumel, Gemcutter Buccaneer triggers, creating a tapped Treasure token.
Activate Krark-Clan Ironworks by sacrificing the Treasure, adding {C}{C}.
Repeat.

Combos with "Gemcutter Buccaneer"