Supernatural voice: Ruv has the ability to shake the church with his voice because his vocals are incredibly strong.
Immortality: The vow had completely stopped Ruv from ageing making sure he will always live up to his deal with Lucifer; So Sarvente and Ruv can live together forever, if either of them does not break the deal. (awwww 😭❤❤)
High-speed reflexes: Ruv has incredibly fast reflexes, mostly to avoid being touched by anyone that isn't Sarvente.