Klefki is card #80 of 114 in Steam Siege (2016), a Uncommon illustrated by Saya Tsuruta. At about $0.79 it is the #40 most valuable card in the set. In a Steam Siege booster it turns up about once every 9 packs. It is one of 11 Klefki cards printed so far.
2014Furious Fists
2015Roaring Skies
2016Steam Siege
2018Forbidden Light
2021Fusion Strike
2023Scarlet & Violet
2024Paldean Fates
2026Perfect Order

















See the full Steam Siege card list
An ungraded Klefki from Steam Siege sells for about $0.79. A PSA 10 is worth more, roughly $3.95 by our estimate, and a PSA 9 around $1.82.
It is a Uncommon, and it shows up about once every 9 Steam Siege packs.
Saya Tsuruta drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open Steam Siege booster packs in your browser with the set's real pull rates and keep what you pull in a digital binder. No real cards, nothing to buy.