I wouldn't be surprised if there's a game winning combo in this deck, but it probably doesn't involve Ravos, who provides recursion and access to White, but not a lot else
First, it reduces the blue mana requirements in situations where you dont draw a second Island, or even those where youre late drawing your first one
Emrakul, the Promised End Emrakul, the Promised End got even better when the battle card type dropped in March of the Machine , and this makes it worth giving your opponent an extra turn after youre done with them
But if you've got nothing worth saving, and want to remove a key threat urgently, you can fire chapter three right away
His Vehicle half introduces the monarchy to your opponent rather than yourself
Abrupt Decay gives Golgari decks a reliable answer that always resolves