Activate Kiki-Jiki by tapping it, targeting Swiftgear Drake.
Holding priority, activate Ashnod's Altar by sacrificing Kiki-Jiki, adding {C}{C}.
Resolve the Kiki-Jiki ability, creating a token copy of Swiftgear Drake.
When the Swiftgear Drake token enters the batlefield, it triggers, putting Kiki-Jiki on the bottom of your library from your graveyard.
Activate Grenzo by paying {2}, putting Kiki-Jiki into your graveyard from the bottom of your library, and then putting it onto the battlefield.
Repeat.

Infinite colorless mana

Infinite creature tokens with haste

Infinite death triggers

Infinite creature ETB

Infinite creature LTB

Infinite creature sacrifice triggers

Infinite self-mill

Grenzo, Dungeon Warden

Kiki-Jiki, Mirror Breaker

Swiftgear Drake

Ashnod's Altar

Activate Kiki-Jiki by tapping it, targeting Swiftgear Drake.
Holding priority, activate Skirk Prospector by sacrificing Kiki-Jiki, adding {R}.
When Kiki-Jiki dies, Pitiless Plunderer triggers, creating a Treasure token.
Resolve the Kiki-Jiki ability, creating a token copy of Swiftgear Drake.
When the Swiftgear Drake token enters the batlefield, it triggers, putting Kiki-Jiki on the bottom of your library from your graveyard.
Activate the Treasure by tapping and sacrificing it, adding {1}.
Activate Grenzo by paying {2}, putting Kiki-Jiki into your graveyard from the bottom of your library, and then putting it onto the battlefield.
Repeat.

Pitiless Plunderer

Skirk Prospector

Activate Kiki-Jiki by tapping it, targeting Swiftgear Drake.
Holding priority, Activate Thermopod's second ability by sacrificing Kiki-Jiki, adding {R}.
When Kiki-Jiki dies, Pitiless Plunderer triggers, creating a Treasure token.
Resolve the Kiki-Jiki ability, creating a token copy of Swiftgear Drake.
When the Swiftgear Drake token enters the batlefield, it triggers, putting Kiki-Jiki on the bottom of your library from your graveyard.
Activate the Treasure by tapping and sacrificing it, adding {1}.
Activate Grenzo by paying {2}, putting Kiki-Jiki into your graveyard from the bottom of your library, and then putting it onto the battlefield.
Repeat.

Combos with "Swiftgear Drake"