One of my favorite cards of his is Hazezon Tamar, a creature that makes Sand Warrior tokens
Sigarda, Champion of Light Sigarda, Champion of Light is the latest in a line of more aggressively costed Angels
The more I look at it, the weirder it gets
(It's also a demon, so it synergizes with one of your alternate win cons.) You could also consider going more of a snow-covered route, so replacing your basic swamps with the snow-covered kind and going with Extraplanar Lens to amplify your black mana
Ace OP03-001 Leader Parallel ($94 / 4,980): Ace as a red leader with classic alternate art
5 Tekuthal, Inquiry Dominus The blue Phyrexian pseudo-god from New Phyrexia doubles up all your proliferation activations just by being in play