helm of awe aegishjalmur or egishjalmur galdrastav icon black color flat style image

aegishjalmur amulet ancient awe black celtiharm color culture danger egishjalmur evil fear gapaldur helm icon illustration image isolated knot knotwork magic magical military mystic mystical nordic norse occult odin old pagan protection rock rune scandinavian scary shield sign skull symbol talisman thor vector vegvisir viking warrior witchcraft