Shattermoon Tracker

Autumn Seasonal
Whenever a non-Human, non-Elf creature enters
the battlefield under an opponent's control, if it's Autumn, investigate. (Create a colorless Clue
artifact token with "{2}, Sacrifice this artifact: Draw
a card.")
The Autumnal scouts were tasked with keeping track
of the Lunespawn and their behaviors, and reporting
their findings back to Springan researchers.