Slag Strider is a uncommon Creature — Elemental card from Modern Horizons 2 (MH2), collector number 141. Current market price: $0.16 (foil $0.33), TCGplayer market prices via Scryfall.
Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.) {1}, Sacrifice an artifact: This creature deals 1 damage to any target.