Inferno's attack area is increased. Explosion will occur if Inferno is used until the end or if Normal Attack button is used. Enemies hit by the explosion will get damage that reduces Critical Resistance. Also, Inferno causes burns.
Inferno EX is a Saleana skill available at Level 55. It improves Inferno, increasing its area of effect. The skill also gets an explosion effect that happens when either the skill is used to its full duration or when the Normal Attack button is used. Enemies hit by the explosion take 40% of Inferno's attack as additional damage and receive a debuff that lowers their Critical Resist by 20% (10% in PvP) for 10 seconds.
In PvP, the skill also inflicts the Burn debuff, inflicting 5% attack for five ticks.