Pyrovile

The Pyroviles are rock-based humanoids from the planet Pyrovilia who appear in the final episode of Season 17.

They have the ability to shoot out flames that can turn humans to ashes in seconds. They are very susceptible to water, with a huge amount being able to kill them. Pyroviles come in two different varieties: shorter foot soldiers and fully grown Pyroviles which are over twice the height of a foot soldier.

The Pyroviles seen in Season 17 originally worshipped Tzim-Sha until he was defeated in a battle with the Thirteenth Doctor. Once the Pyroviles saw that their supposed God was actually too weak to be their God, they incinerated him using their fire breath, unaware that he had actually managed to teleport away before the flames could destroy him.