Source: Dungeon Master's Guide

Rod, legendary (requires attunement by a cleric, druid, or paladin)

This rod has 5 charges. While you hold it, you can use an action to cast one of the following spells from it: Heal (expends 1 charge) or Resurrection (expends 5 charges.

The rod regains 1 expended charge daily at dawn. If the rod is reduced to 0 charges, roll a d20. On a 1, the rod disappears in a burst of radiance.