Helmets with skull designs might look badass, but which ones offer proper protection? ... as that green flame inside looks like it might cause indigestion. Definitely a Halloween helmet, but still ...

Create green fire with water using this amazing flame trick. TKOR. ... A 'skull' on Mars and the discovery of a brand-new color.

To complete the Sea of Thieves Fort of the Damned, you will need to get your hands on quite a few in-game resources such various colored flames and a Ritual Skull to activate it.