Erdwal Illuminator

Flying
Whenever you investigate for the first time each turn, investigate an additional time.

Academy Manufactor

If you would create a Clue, Food, or Treasure token, instead create one of each.

Tap up to two target creatures.
Investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")

When Thraben Inspector enters, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")