Robe of Scintillating Colors
Wondrous item, very rare, requires attunement · 2014 rules, SRD 5.1
3 charges (regain 1d3 at dawn). Action: 1 charge for shifting patterns: creatures that see you are stunned (DC 15 Wis) and attacks against you have disadvantage.
Also in the 2024 rules (SRD 5.2).