Balrog of Moria

Maiar > Balrogs > Balrog of Moria:
    The evil Maia spirit under Khazad-dum/Moria, brought up by accident in the deep delving of the dwarves of Durin, also called Durin's Bane.

The Balrog of Moria  by Eru-(Valar)
Balrog of Moria  by Varda-(Valar) 

Images of the Balrog of Moria

Image: "Khazad-dum". The balrog in Khazad-dum. Artist Kevin Crossley.  
Image: " Gandalf vs Balrog". Artist Maciek Wygnanski. Rolozo