Ominous Harvest

• WWizards of the Coast2026-03-20
  Official Ruling
  Gravestorm counts all permanents put into graveyards from the battlefield this turn. It doesn't matter who controlled those permanents, who owns them, or whether or not they were tokens.
• WWizards of the Coast2026-03-20
  Official Ruling
  You may choose new targets for any of the copies. You can make different choices for each copy.
• WWizards of the Coast2026-03-20
  Official Ruling
  The copies of Ominous Harvest created by its gravestorm ability are created on the stack, so they're not cast and won't cause abilities that trigger when a player casts a spell to trigger.
• WWizards of the Coast2026-03-20
  Official Ruling
  The triggered ability that creates the copies can itself be countered by anything that can counter a triggered ability. If it is countered, no copies will be put onto the stack.
• WWizards of the Coast2026-03-20
  Official Ruling
  A copy of a spell can be countered like any other spell, but it must be countered individually. Countering a spell with gravestorm won't affect the copies.

Rulings via Scryfall