Krosan Adaptation

• WOTC Official Reminder Textofficial rules
  Storm — When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.

• WWizards of the Coast2019-11-12
  Official Ruling
  The storm ability and the copies it creates all resolve before the spell with storm. They resolve even if the spell with storm is countered.
• WWizards of the Coast2019-11-12
  Official Ruling
  The copies storm creates are created on the stack, so they’re not cast. Abilities that trigger when a player casts a spell (such as storm) won’t trigger.
• WWizards of the Coast2019-11-12
  Official Ruling
  Storm counts spells cast before the spell with storm was cast. Spells cast after the spell with storm was cast but before the storm ability resolves aren’t counted.
• WWizards of the Coast2019-11-12
  Official Ruling
  For effects that look for or modify the creation of tokens, the token copies of Krosan Adaptation are considered to have been “created” and those effects will apply.

Rulings via Scryfall