You have sacrificed a number of artifacts and/or creatures this turn equal to the number of times you've cast Dargo from the command zone this game minus seven.
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.
When Dargo dies, Cemetery Puca triggers, choose not to pay.
Activate five Treasures by tapping and sacrificing them, adding ({3} magic symbol) ({B} magic symbol) ({R} magic symbol) .
Cast Dargo by paying ({R} magic symbol) and sacrificing Ruthless Technomancer.
When Ruthless Technomancer dies, Cemetery Puca triggers, causing you to pay ({1} magic symbol) to have it become a copy of Ruthless Technomancer.
Activate Cemetery Puca by paying ({2} magic symbol) ({B} magic symbol) and sacrificing two Treasures, returning Ruthless Technomancer from your graveyard to the battlefield.
Repeat steps 2 through 4 one additional time.
Activate four Treasures by tapping and sacrificing them, adding ({2} magic symbol) ({B} magic symbol) ({R} magic symbol) .
Cast Dargo by paying ({R} magic symbol) and sacrificing Ruthless Technomancer.
When Ruthless Technomancer dies, Cemetery Puca triggers, choose not to pay.