In a Legacy GP match that you are observing, Apollo is at 3 life while playing against Neptune, who is at 5 life. Apollo casts Chain Lightning, tapping one of his two Mountains, targeting Neptune, who has several red mana available. Neptune says “it resolves” and marks herself down to 2. Apollo looks at you, waits a few seconds, then announces he’s casting a second Chain Lightning targeting Neptune. What do you do?Answer
Judges feel free to answer on Judge Apps!