Bovine Intervention

• WWizards of the Coast2024-04-12
  Official Ruling
  If the target artifact or creature is an illegal target by the time Bovine Intervention tries to resolve, the spell doesn’t resolve. No player creates an Ox token. If the target is legal but not destroyed (most likely because it has indestructible), its controller does create an Ox token.

Rulings via Scryfall