Inspired Ultimatum

• WWizards of the Coast2020-04-17
  Official Ruling
  If either target becomes illegal before Inspired Ultimatum resolves, the other will be affected as appropriate and you'll draw five cards. If both targets become illegal, the spell won't resolve and you won't draw five cards.
• WWizards of the Coast2020-04-17
  Official Ruling
  You can target yourself as the player to gain 5 life.
• WWizards of the Coast2025-04-04
  Official Ruling
  You can target yourself as the player to gain 5 life.
• WWizards of the Coast2025-04-04
  Official Ruling
  If either target becomes illegal before Inspired Ultimatum resolves, the other will be affected as appropriate and you’ll draw five cards. If both targets become illegal, the spell won’t resolve and you won’t draw five cards.

Rulings via Scryfall