Mareep is card #38 of 114 in Steam Siege (2016), a Common illustrated by Eri Yamaki. At about $0.72 it is the #48 most valuable card in the set. In a Steam Siege booster it turns up about once every 6 packs. It is one of 28 Mareep cards printed so far.
2000Neo Genesis
2003Aquapolis
2006Dragon Frontiers
2009Platinum
2011Call of Legends
2016Steam Siege
2018Lost Thunder
2021Chilling Reign

















See the full Steam Siege card list
An ungraded Mareep from Steam Siege sells for about $0.72. A PSA 10 is worth more, roughly $3.60 by our estimate, and a PSA 9 around $1.66.
It is a Common, and it shows up about once every 6 Steam Siege packs.
Eri Yamaki 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.