Id recommend focusing on a mix of the best disguise creatures listed above if possible

Release date: 1996-10-08 Abyssal Hunter Acidic Dagger Afiya Grove Afterlife Agility Alarum Aleatory Amber Prison Amulet of Unmaking Ancestral Memories Armor of Thorns Armorer Guildmage Ashen Powder Asmira, Holy Avenger Auspicious Ancestor Azimaet Drake Bad River Barbed Foliage Barbed-Back Wurm Barreling Attack Basalt Golem Bay Falcon Bazaar of Wonders Benevolent Unicorn Benthic Djinn Binding Agony Blighted Shaman Blind Fury Blinding Light Blistering Barrier Bone Harvest Bone Mask Boomerang Breathstealer Brushwagg Builder's Bane Burning Palm Efreet Burning Shield Askari Cadaverous Bloom Cadaverous Knight Canopy Dragon Carrion Catacomb Dragon Celestial Dawn Cerulean Wyvern Chaos Charm Chaosphere Charcoal Diamond Chariot of the Sun Choking Sands Cinder Cloud Circle of Despair Civic Guildmage Cloak of Invisibility Consuming Ferocity Coral Fighters Crash of Rhinos Crimson Hellkite Crimson Roc Crypt Cobra Crystal Golem Crystal Vein Cursed Totem Cycle of Life Daring Apprentice Dark Banishing Dark Ritual Dazzling Beauty Decomposition Delirium Dirtwater Wraith Discordant Spirit

Again, the color identity rule is in play here
Shift allows the four cost card to be deployed for only three ink, Evasive makes him difficult to challenge, and Challenger +3 gives him a boost when he's on the attack
Between Sin, Spira's PunishmentSin, Spira's Punishment costing too much mana and Seymour FluxSeymour Flux having too few colors about it, Yuna felt like the right choice for this superlative spot
Smaug the Magnificent does just that because creating a treasure each turn is already big game