Argyus Arrow

When fired out of a bow, this +2 arrow transforms into a large, sharpened icicle. 

This arrow inflicts 1d10 cold damage on any target, in addition to the damage done by the bow/firing apparatus. 

On a successful attack, the arrow returns to your hand immediately. On a miss, it returns after 1d4 turns.

Notes: by casting an ice-spell on the arrow and taking a long rest with it.