Necklace of Fireballs
Wondrous Item,
Rare
(cost 1050 gp)
Crafting Components
Fire from the Plane of Fire, powdered fiend horn
This gorgeous necklace is affixed with 1d6+3 beads that radiate power. You can use an action to hurl a bead up to 60 feet. When the bead lands it detonates as a 3rd-level fireball (save DC 15).
You can hurl multiple beads with the same action, increasing the spell level of the fireball by 1 for each bead beyond the first.
Source