https://minecraft.fandom.com/wiki/Minecraft_Dungeons:Wildfire

A wildfire is a powerful mob that is seen in the Luminous Night seasonal adventure and Flames of the Nether DLC. It is a more powerful variant of the blaze, even capable of summoning them. It was originally meant for the Flames of the Nether DLC, but a statue in the Nether Fortress still pays homage to it.

Appearance A wildfire is a large mob, similar in appearance to a blaze albeit bigger and somewhat tougher. It possesses four large shields which float around it and act as protection. These four shields of the wildfire happen to be its own model and entity that is separate from the wildfire. Wildfires also blaze rod-like pillar under their blaze-like head. What makes its head different from blazes, however, is the helmet that it wears which is fitted with a small red gem.