5e SRD:Demon Armor
From D&D Wiki
|This material is published under the OGL|
Armor (plate), very rare (requires attunement)
While wearing this armor, you gain a +1 bonus to AC, and you can understand and speak Abyssal. In addition, the armor's clawed gauntlets turn unarmed strikes with your hands into magic weapons that deal slashing damage, with a +1 bonus to attack rolls and damage rolls and a damage die of 1d8.