Be careful to always keep extra abilities in play or you may be forced to apply this ability to a quest, wasting it since it has no level tokens. If the time should come that you have only this ability in play and no abilities in your hand, that's the time to let him go super nova.
This card, when played with others as follows, form a powerful combination:
This is a field-clearer. Make sure you have 4 Blindsides in your hand so you can burn the field over and over anytime your opponent starts fielding more units than you are happy with, then when you reach the endgame, destroy your Fiery Inferno to deal 3 to your opponent's avatar making this an excellent kill-shot.
During any combat, Exert Fiery Inferno and deal 1 damage to all opposing combatants.
Wanna do it again?
Play Blindside (no cost) to ready Fiery Inferno, then burn them all again.
And finally, the coup de gras:
Pay 8 power, destroy Fiery Inferno, and deal 3 damage to all opposing avatars and units.