A tale of the bow found deep in the roots of the Spine of the World near Icewind Dale by a human ranger...

This wicked bow was crafted thousands of years ago for a powerful yuan-ti archer named Apali. The number of men, women, and children Apali killed with the aid of the bow is almost unbelievable, as the soldier waged war against humans for hundreds of years before he was finally laid low in Chessenta by a priest of Assuran, god of vengeance. Apali had killed the priest's great-great grandfather in Chult over a hundred years earlier.

The item is easily recognized because of the red and black banding on the grip and the carved snake heads at the ends of the bow. The red and black bandings represent Apali's family, from a caste of priests. The snake heads represent Sseth, the god of the yuan-ti.

2.0/IWD Statistics
Composite Longbow +1, extremely fast, speed 3.

Rededicated to Sseth, but taken from the his followers before their ritual realized.

5th Edition Statistics

Messenger of Sseth

Weapon, rare

Attunement

Long Rest, focusing and meditating with the bow

Properties

Martial, Heavy, Ranged, Ammunition, Magical

Weight

2 lb.

Cost

Unknown/Priceless

Damage.

1d8+1 piercing

Range.

100/400

Sseth's Sight.

Gain additional 60 ft. of Darkvision

Sseth's Strike.

If you have already taken the attack action this turn, you may take 1 additional ranged attack with this weapon as a bonus action.