Viper Bracers (Patreon)

Wondrous item, uncommon (requires attunement by a monk)

While wearing these twisted, emerald green bracers, you can use your reaction when a creature targets you with a melee attack to make two unarmed strikes against it. For each attack that hits, that creature is poisoned for 1 round, ending at the start of its turn on the round that it would end. This property of the bracers can't be used again until the next dawn.

Coiled and ready to strike.