Dargo, the Shipwrecker + Mardu Siegebreaker + Ruthless Technomancer

Cast Ruthless Technomancer by paying .

When Ruthless Technomancer enters the battlefield, it triggers, causing you to sacrifice Dargo and create seven Treasure artifact tokens.

Choose to return Dargo to the command zone from your graveyard.

Activate five Treasures by tapping and sacrificing them, adding .

If you cannot currently cast Dargo for , including commander tax, activate a Treasure by tapping and sacrificing it, adding one mana of any color

Repeat this until you can cast Dargo for and/or you run out of Treasures.

Cast Dargo from the command zone by paying at most .

Cast Mardu Siegebreaker by paying .

When Mardu Siegebreaker enters the battlefield, its first ability triggers, exiling Ruthless Technomancer until Mardu Siegebreaker leaves the battlefield.

Declare Mardu Siegebreaker as an attacker, triggering its second ability, creating a token copy of Ruthless Technomancer that is tapped and attacking.

When the Ruthless Technomancer token enters the battlefield, it triggers, causing you to sacrifice Mardu Siegebreaker and create four Treasure tokens.

When Mardu Siegebreaker leaves the battlefield, the nontoken Ruthless Technomancer returns to the battlefield from exile.

When the nontoken Ruthless Technomancer enters the battlefield, it triggers, causing you to sacrifice Dargo and create seven Treasure tokens.

Choose to return Dargo to the command zone from your graveyard.

Move to your postcombat main phase.

Activate four Treasures by tapping and sacrificing them, adding .

Cast Dargo from the command zone by paying and sacrificing the nontoken Ruthless Technomancer.

Activate the token Ruthless Technomancer by paying and sacrificing two Treasures, returning the nontoken Ruthless Technomancer from your graveyard to the battlefield.

Repeat from step 12, skipping step 14 as you are already in a main phase.