Talisman of Pure Good
Wondrous item, legendary, requires attunement by a creature of good alignment · 2014 rules, SRD 5.1
Holy symbol (+2 spell attacks); 7 charges: action to make a fiend or undead within 120 ft fall into a fissure to its destruction (DC 20 Dex).
Also in the 2024 rules (SRD 5.2).