Ravio's Bracelet (5e Equipment)
From D&D Wiki
Wondrous item, legendary
Requires attunement. If you are the unwilling target of a mergewall spell, you are instead treated as if you are a willing target.
Requires attunement. You can cast mergewall on yourself as an action. Once this spell ends, at least 1 minute must pass before you can again be the target of a mergewall spell.