Half Plate Armor of Etherealness

Medium armor, legendary (requires attunement)

• Armor Class: 15 + Dex modifier (max of +2)
• Stealth: The wearer has disadvantage on Stealth (DEX) checks.
• Weight: 40.0 lbs.

While you’re wearing this armor, you can take a Magic action and use a command word to gain the effect of the Etherealness spell. The spell ends immediately if you remove the armor or take a Magic action to repeat the command word. This property of the armor can’t be used again until the next dawn.

Source: Dungeon Master’s Guide (2024) p. 286. Available in the SRD and the Free Rules (2024)