The Sanguine Bond enchantment has been a favorite of many commander players. But for 5 mana, it was still quite expensive. So now we get Vito, Thorn of the Dusk Rose. It only costs 3 mana and has the same effect in a commander shell.
Vito will most likely end up in Orzhov Life Drain decks alongside a copy of Sanguine Bond and Defiant Bloodlord. Vampire tribal decks can be quite dangerous, and with Vito in the format, they just got even better.