dmrulesteam wrote:1. It isn't a new source, it can only increase damage being dealt.
(So no on the Hulk example)
2. It can only add damage to a character who is already taking damage. So if you were using Power Bolt to do 2 damage to your opponent's character with 3 defense, Human Torch could help you KO them. However, if you were trying to KO your opponent's Doctor Strange with 9 defense, you couldn't pay 7 Bolts for Human Torch's ability.
(If you were already doing damage to the Hulk, yes, but typically there isn't a reason since it isn't a new source and wouldn't trigger his ability an additional time)
Why wouldn't you be able to do the 7 damage to Dr.Strange? I was under the impression that this passage from the rulebook allows it.
During the main step and attack step, both players can use global abilities. In many cases, global abilities may be used more than once if the cost can be paid multiple times. As with purchasing dice, you can partially spend non-generic energy. Global abilities that are paid for in a batch resolve as a single effect.