Unown is card #40 of 90 in HS—Undaunted (2010), a Uncommon illustrated by Hideaki Hakozaki. At about $5.57 it is the #66 most valuable card in the set. In a HS—Undaunted booster it turns up about once every 8 packs. It is one of 96 Unown cards printed so far.
1999Wizards Black Star Promos
2001Neo Discovery
2005Unseen Forces
2007Secret Wonders
2010HeartGold & SoulSilver
2015Ancient Origins
2022Silver Tempest
202630th Celebration

















See the full HS—Undaunted card list
An ungraded Unown from HS—Undaunted sells for about $5.57. A PSA 10 is worth more, roughly $44.56 by our estimate, and a PSA 9 around $15.60.
It is a Uncommon, and it shows up about once every 8 HS—Undaunted packs.
Hideaki Hakozaki drew the art for this card.
Yes, as a digital simulator. Holobrook lets you open HS—Undaunted 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.