well, if you wanna make an endgame scenario, you should add Sanguine Bond in there to go with that Exquisite Blood. also, if you want to have a fun little cycle of stealing creatures and doing damage by doing so, add Grave Betrayal and Warstorm Surge.
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For some real cruelty, add Grave Betrayal and Warstorm Surge! The Grave betrayal will take their dead creatures and make them Zombies with a +1/+1 on each of them! The Warstorm Surge will make it so when they do enter, they deal extra damage to more things you can kill. And the cycle repeats itself every turn!