You know have Vindictive Vampire, and Bastion of Remembrance as extra aristocrat piece. Have you considered Mikaeus, the Unhallowed? He combos off with Walking Ballista, Woodfall Primus, Triskelion, and Murderous Redcap. Also has excellent synergy with Kokusho, the Evening Star, which is also just a general "good-stuff" card that can keep you in the game. Other just great synergy cards I recommend are Growing Rites of Itlimoc  ^Flip, and Phyrexian Tower. Vivien, Monsters' Advocate can outright win games if you are able to keep her for a turn with Prossh into Purphoros.

Check out my list at My Dragon Ate My Homework, and Everything Else.

Hi epajula, I had considered Mikaeus but I had preferred some other cards. Now I'll try to reconsider it because it's very strong and it has a strong interaction with the deck. Thank you for the suggestions, especially for Growing Rites of Itlimoc  ^Flip and Phyrexian Tower, I'll put them into the deck for sure!! I'll take a look about your deck. Feel free to leave me your upvote if you like the deck ;-). Ps: I'll try to include also Ashnod's Altar to have another way to make the Food Chain combo.