Fire Shield (Half-Baked Komali)
From Guild Wars 2 Wiki
Fire Shield is an aura that burns, poisons, and weakens[verification requested] foes and grants might when attacked. Half-Baked Komali gains the effect periodically and it can be removed by breaking the defiance bar.“
Envelop yourself in a shield of fire that provides buffs and burns foes.
— In-game description