Looking across Magic's history, it's clear why blue is among the best colors mtg

Ashcloud Phoenix Aven Cloudchaser Cinder Cloud Cloud Cover Cloud Crusader Cloud Djinn Cloud Dragon Cloud Elemental Cloud Key Cloud Manta Cloud Pirates Cloud Spirit Cloud Sprite Cloud of Darkness Cloud of Faeries Cloud's Limit Break Cloud, Ex-SOLDIER Cloud, Midgar Mercenary Cloud, Planet's Champion Cloudblazer Cloudbound Moogle Cloudchaser Eagle Cloudchaser Kestrel Cloudcrest Lake Cloudcrown Oak Cloudfin Raptor Cloudform Cloudgoat Ranger Cloudheath Drake Cloudhoof Kirin Cloudkill Cloudkin Seer Cloudpiercer Cloudpost Cloudreach Cavalry Cloudreader Sphinx Cloudsculpt Technician Cloudseeder Cloudshift Cloudshredder Sliver Cloudskate Cloudspire Captain Cloudspire Coordinator Cloudspire Skycycle Cloudsteel Kirin Cloudstone Curio Cloudthresher Death Cloud Hypnotic Cloud Krosan Cloudscraper Lifted by Clouds Lightning Cloud Meloku the Clouded Mirror Najeela, the Blade-Blossom Nyxbloom Ancient Oboro, Palace in the Clouds Oltec Cloud Guard Pride of the Clouds Riftwing Cloudskate Sea of Clouds Shepherd of the Clouds Skycloud Egg Skycloud Expanse Soratami Cloud Chariot Soratami Cloudskater Spore Cloud Stormcloud Djinn Stormcloud Spirit The Western Cloud Thundercloud Elemental Thundercloud Shaman Untaidake, the Cloud Keeper

The only time a default preferred setting may not apply is within the MTG Arena Limited format mode, if that card was reprinted for the current Draft or Sealed set
Like most Magic: The Gathering cards, the value of Millikin depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Final Fantasy Commander)
It was made to work very well with adventure cards, so you can play the adventure side of the exiled cards and play the regular side on a later turn