You have found a gem from the Upside Down.
You are looking at an Autograph Trading Card from Stranger Things Season 2.
This card features a blue ink on card autograph by Brett Gelman who portrayed Murray Bauman in Stranger Things.
This card is number A-BA
Brett Gelman is known for their roles in movies such as in Fleabag | The Other Guys and Lemon.
Produced by Topps in 2019.