Necklace of Fireballs

Necklace of Fireballs DMG p182 Wondrous item, rare Minor tier 1 lb. This necklace has 1d6 + 3 beads hanging from it. You can use an action to detach a bead and throw it up to 60 feet away. When it reaches the end of its trajectory, the bead detonates as a 3rd-level fireball spell (save DC 15).
You can hurl multiple beads, or even the whole necklace, as one action. When you do so, increase the level of the fireball by 1 for each bead beyond the first.
Found On: Magic Item Table C Source: DMG, page 182. Available in the SRD.
Volo had one with 3 beads in Session 45: Back to the Keep Report

Item type

Consumable, Magical