Shatter the Source is a common Instant card from March of the Machine (MOM), collector number 164. Current market price: $0.34 (foil $0.14), TCGplayer market prices via Scryfall.
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Choose one — • Shatter the Source deals 6 damage to target creature, planeswalker, or battle. • Destroy target artifact.