Mogg Mob

• WWizards of the Coast2024-06-07
  Official Ruling
  If some of the targets are illegal as Mogg Mob's activated ability tries to resolve, the original division of damage still applies and the damage that would have been dealt to the illegal targets is lost. It won't be dealt instead to a legal target.
• WWizards of the Coast2024-06-07
  Official Ruling
  You choose how many targets Mogg Mob's ability has and how the damage is divided as you activate the ability. Each target must receive at least 1 damage.

Rulings via Scryfall