Objectives and walkthrough
Pursue the convoy and search the copper barrels
Pursue the illager convoy, defeat five illagers, and search the copper barrel. Continue the pursuit rather than stopping at this first barrel. At the next location, defeat another five illagers before searching the next copper barrel.
Continue the pursuit and search the final barrel
Pursue the convoy again. Defeat the illagers, then search the copper barrel after the battle. With the copper recovered, take it back to the Inventor.
Deliver the copper to the Inventor
Bring the copper to the Inventor in Puddle Pond. Finish the delivery after defeating the convoy and recovering its cargo.