The original Skirk Prospector appeared in Onslaught, in 2002.
The original art was by Doug Chaffee.
Dominaria Remastered
The List
Dominaria
Duel Decks Anthology: Elves vs. Goblins
Duel Decks: Knights vs. Dragons
Duel Decks: Elves vs. Goblins
Onslaught