O Juramento de Devoção paladino recebe o Arma Sagrada Divindade do canal opção no nível 3rd:
As an action, you can imbue one weapon that you are holding with positive energy, using your Channel Divinity. For 1 minute, you add your Charisma modifier to attack rolls made with that weapon. The weapon also emits bright light in a 20-foot radius and dim light 20 feet beyond that. If the weapon is not already magical, it becomes magical for the duration.
O lâmina de sombra a descrição do feitiço (XGtE, p. 164) diz:
You weave together threads of shadow to create a sword of solidified gloom in your hand. It counts as a simple melee weapon with which you are proficient. In addition, when you use the sword to attack a target that is in dim light or darkness, you make the attack roll with advantage.
Se meu paladino de devoção evoca um lâmina de sombra e ataca um alvo nas cavernas escuras, ataco com vantagem.
Se você usar a Arma Sagrada, ela agora emitirá luz brilhante. Perco todas as vantagens obtidas com o lâmina de sombra?