Shieldon is card #69 of 114 in Steam Siege (2016), a Uncommon illustrated by Mizue. At about $0.64 it is the #57 most valuable card in the set. In a Steam Siege booster it turns up about once every 9 packs. It is one of 7 Shieldon cards printed so far.
2007DP Black Star Promos
2009Platinum
2016Steam Siege
2018Ultra Prism
2022Astral Radiance
2026Pitch Black

















See the full Steam Siege card list
An ungraded Shieldon from Steam Siege sells for about $0.64. A PSA 10 is worth more, roughly $3.20 by our estimate, and a PSA 9 around $1.47.
It is a Uncommon, and it shows up about once every 9 Steam Siege packs.
Mizue 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.