Some major changes were made in the last patch on CN. There might be bugs when China is selected. Other servers will not experience issues. My apologies for the inconvenience.
Attacks have a 10% chance to reduce the target's Fire Resistance by 5% for 5s. 8s cooldown against the same target. A Signature Move increases Fire DMG by 20% and doubles the chance of reducing the target's Resistance.
Diode Torch
Inflicts Embers effect upon dealing Fire DMG. Embers: reduces the target's Fire Resistance by 8% for 8s. Repeated triggering refreshes the duration.
Incandescence
Weapon's final ATK increases by 15% at the start of battle. No duration limit.