This one is from FAAngband 1.1.5.
Of course, I found it with a mage ... at least he's an elf, so he can make
some use of it
Code:
The Long Bow of the Eagle Lord (x4) (+16,+16) <+1>
Activation: brand missiles* every 1750 turns
+1 shooting power, +50% electricity resist, fearlessness, perm light;
Cannot be harmed by acid, electricity, fire, cold.
(* means +2,+2 and fire, cold, or acid brand)