Fiery Grim (Also called "Flame Spirits" or "Fire-hearts") were lesser elemental Spirits, possibly Spirits of Arda.They had little intelligence on their own and were for the most part formless, except for a vague form or Fána of dark fire. Fiery grim were known to be attracted by other, more powerful Fire Spirits, notably Balrogs.
References[]
- LOTRO