Lightning Spear is a common Artifact — Equipment card from Modern Horizons 2 (MH2), collector number 134. Current market price: $0.19 (foil $0.27), TCGplayer market prices via Scryfall.
Equipped creature gets +1/+0 and has trample. {2}{R}, Sacrifice this Equipment: It deals 3 damage to any target. Equip {1}