This human advisor has you Investigate (create a clue) for each opponent who lost life on your turn, and can create a flying token each time a Clue is sacrificed (the dreaded 'once per turn' clause rears its ugly head, however)
When you do get the effect off, its a gamble: itll mill cards from your opponent until they reveal a land, and the equipped creature gains +1/+0 per card revealed
My first try for a legendary creature / Background pick might be Candlekeep Sage and Abdel Adrian, Gorlons Ward to generate many tokens
This is concerning because once the package is shipped, there is no way of knowing if its waiting to be processed at PSA or lost in the mail
To prevent any problems, please check the condition of the item in the photos before you purchase
You can find the cuts in the sideboard of the final upgraded decklist, over on Moxfield