Muk is card #31 of 90 in HS—Undaunted (2010), a Uncommon illustrated by Midori Harada. At about $6.38 it is the #60 most valuable card in the set. In a HS—Undaunted booster it turns up about once every 8 packs. It is one of 32 Muk cards printed so far.
1999Fossil
2002Legendary Collection
2006Legend Maker
2009Platinum
2010HS—Undaunted
2013Plasma Freeze
2017Burning Shadows
2022Brilliant Stars

















See the full HS—Undaunted card list
An ungraded Muk from HS—Undaunted sells for about $6.38. A PSA 10 is worth more, roughly $51.04 by our estimate, and a PSA 9 around $17.86.
It is a Uncommon, and it shows up about once every 8 HS—Undaunted packs.
Midori Harada 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.