Dwarven Blastminer is a uncommon Creature — Dwarf card from Onslaught (ONS), collector number 199. Current market price: $0.57 (foil $9.95), TCGplayer market prices via Scryfall.
{2}{R}, {T}: Destroy target nonbasic land. Morph {R} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)