When a creature with the hazardous X keyword is chosen to be fought, it deals X damage to the opposing creature before the fight resolves. (The active player chooses whether this occurs before or after other “Before Fight” effects and keywords.) If this damage destroys the other creature, the rest of the fight does not occur.
If a creature with the hazardous (X) keyword gains another instance of the hazardous (X) keyword, the two X values are added together.
Elusive has been turned off. Because you engaged in a fight the Elusive keyword has been resolved and cannot be resolved a second time.Source: Crucible Cast 14