Burning

Burning is debuff, that dealing fire damage every 0.5 seconds over 5 seconds

If applied on already burning target, renewing duration to 5 seconds, damage left on previous burn added to new one

Fire and frost debuffs interaction
Target with Wet, Cold or Ice can't burn, removing 1 Wet/Cold/Ice for every 5 Burning applied, but reducing Burning for 5 per stack removed

Applying Wet, Cold or Ice renews Burning to 5 seconds but reducing the Burning damage by 5 per stack applied

Elementalist is very skilled in elemental magic and can apply Burning with Wet, Cold and Ice at the same time, without losing any stacks.