Ring of Evasion

Ring, major, rare (requires attunement)

This ring has 3 charges, and it regains 1d3 expended charges daily at dawn. When you fail a Dexterity saving throw while wearing it, you can use your reaction to expend 1 of its charges to succeed on that saving throw instead.

Source: Dungeon Master’s Guide p. 191. Available in the SRD and the Basic Rules (2014)