Flying (This creature can't be blocked except by creatures with flying or reach.)
When Ethereal Investigator enters the battlefield,
investigate (To investigate, create a colorless Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.") X times, where X is the number of opponents you have.
Whenever you draw your second card each turn, create a 1/1 white Spirit creature token with
flying (This creature can't be blocked except by creatures with flying or reach.).