As a sorcery, you may pay the mana cost of a locked door to unlock it.) You pay all costs and follow all timing rules for cards played with the permission granted by Charred Foyer's ability
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
Without descend active, this ends up being a subpar Regrowth effect, which isn't always in demand
Doubling Season Showcase (Fracture Foil) Introduced back in 2005 in the Ravnica: City of Guilds set, Doubling Season has gotten the reprint treatment in MTG Foundations
The sheer amount of upsides the card has is seriously held back by the high mana cost, so take that for what you will
