Cone of Flame
Sorcery
Cone of Flame deals 1 damage to any target, 2 damage to another target, and 3 damage to a third target.
Chippy
Welcome Deck 2016 (W16)
• #12Rulings
If one or two of Cone of Flame’s targets are illegal when it resolves, you can’t change how much damage will be dealt to the remaining legal targets.
(wotc • 2014-07-18)
Each of the three targets must be different. If there aren’t three different legal targets available, you can’t cast the spell.
(wotc • 2014-07-18)
Rulings
If one or two of Cone of Flame’s targets are illegal when it resolves, you can’t change how much damage will be dealt to the remaining legal targets.
(wotc • 2014-07-18)
Each of the three targets must be different. If there aren’t three different legal targets available, you can’t cast the spell.
(wotc • 2014-07-18)