Insidious Will
Kaladesh Promos · 52s/83 · Rare
$2.24 Near Mint market price (TCGplayer).
Insidious Will is card 52s of 83 in Kaladesh Promos, released in September 2016. Its rarity is Rare. The artwork is by Anthony Palumbo. Insidious Will has also been printed in 1 other set, so check the set and number to compare like with like.