Professional Face-Breaker: I feel obligated to preface this one by mentioning that although she has my favorite card name in years, this card was chosen for my top 10 based on game mechanics alone
Gruul Ramp - Where you get lands to your hand with things like Cultivate while ramping and then drop the land to discard and get your lands with Life from the Loam

Ascended Lawmage Augury Adept Aven Mimeomancer Azorius Guildmage Azorius thermage Deepway Navigator Deputy of Acquittals Deputy of Detention Elite Guardmage Epistolary Librarian Ethersworn Shieldmage Genku, Future Shaper Glamer Spinners Hama Pashar, Ruin Seeker Hope Estheim Ith, High Arcanist Jubilant Skybonder Kangee, Aerie Keeper Kangee, Sky Warden Krile Baldesion Kwain, Itinerant Meddler Kykar, Zephyr Awakener Linvala, Shield of Sea Gate Malcator, Purity Overseer Meddling Mage Midnight Pathlighter Mistmeadow Vanisher Mistmeadow Witch New Prahv Guildmage Niko, Light of Hope Portal Manipulator Puresight Merrow Raff Capashen, Ship's Mage Raff, Weatherlight Stalwart Rasputin Dreamweaver Rasputin, the Oneiromancer Reflector Mage Senate Guildmage Sharae of Numbing Depths Somnomancer Stenn, Paranoid Partisan Sygg, River Guide Thistledown Duo Watcher of the Spheres Will, Scion of Peace
So I went back to the drawing board
Its important to remember that CMM Limited is not a singleton format
Madcap Skills, Sticky Fingers, and Messenger's Speed are great examples of low-cost auras to include in a Valduk deck, and this can make for a fun Pauper commander