Dailir was Beleg Cuthalion's arrow that always returned to him unharmed, mentioned only in the Lays of Beleriand. Its shaft was described as feather-pinioned and snaketonguéd.

However, it finally broke when Beleg fell on it while saving Turin.

**Note : This information comes from the HoMe series of books, which means that it is considered to be from J.R.R. Tolkien's earlier, unrevised writings. Therefore, this information cannot necessarily be considered canonical.**
Encyclopedia entry originally written by defender_of_Lothlorien