Calamity Ring (5e Equipment)
From D&D Wiki
This black ring houses a gem which casts an orange glow, both faint and dire. The ring has a number of charges equal to the wearer's spellcasting ability modifier and regains 1 expended charge daily at dawn. While wearing this ring, you can use an action to make the following attack.
Red Eye Telekinesis (expends 1 charge). Ranged Spell Attack: +15 to hit, range 30/60 ft., one tiny or larger creature. Hit: The creature becomes vulnerable to all damage types and becomes restrained. At the start of each of its turns, the creature can make a Strength saving throw contested against the wearer's spell save DC. On a success, it is no longer restrained.
Curse. While you wear this ring, you are vulnerable to all damage types.