Whir of Invention

Rare1 version from The List · all sets

Cheapest version$5.54TCGplayer market price

Mystery Booster2019

Draft Booster 1 in 121 packsany version · 18% per box of 24

VersionPriceDraft Booster

The List #AER-49 $5.541 in 121 packs18% per box

"Any version" adds up the chances of each version, so it is a close estimate.