Source: Mythic Odysseys of Theros

Weapon (sling bullet), very rare

The sling bullets come in a pouch, which contains 1d4 + 4 bullets. Roll on the Magic Sling Bullets table for each bullet to determine its magical property.

You have a +2 bonus to attack and damage rolls made with each of these bullets. If a bullet misses its target, the bullet teleports back into the pouch. Once a bullet hits a target, the bullet loses its magic.

Magic Sling Bullets
d4	Bullet
1	Banishment. A creature that takes damage from this bullet must succeed on a DC 15 Charisma saving throw or be banished as though affected by the Banishment spell.
2	Fulguration. On a hit, this bullet deals an extra 2d8 lightning damage to its target. All other creatures within 10 feet of the target must each succeed on a DC 15 Constitution saving throw or take 1d8 thunder damage.
3	Stunning. On a hit, this bullet deals an extra 1d10 force damage, and the target is stunned until the end of your next turn.
4	Tracking. A creature that takes damage from this bullet is marked with a glowing rune where the bullet hit. The mark lasts 24 hours. While the creature is marked, you always know the direction to it.