Frost Grim, also known as Chilling Grim, Freezing Grim or Ice-hearts, were Demons of cold, thought to be fallen or corrupted Spirits of Arda, embodying frost, winter and cold Storms.
They had little intelligence on their own and only a weak Fána, appearing as an icy sparkle or glint.They were however known to be attracted by more powerful beings such as Helegrogs.