What are the official rulings for Unleash the Inferno?
user
0. A permanent cannot be dealt 0 excess damage.
1. Excess damage has been dealt to a creature if the damage dealt to it is greater than lethal damage. Usually, this means damage greater than its toughness, although damage already marked on the creature is taken into account.
2. Excess damage has been dealt to a planeswalker if the amount of damage dealt to it is greater than the number of loyalty counters that it had remaining when the damage was dealt.
assistant