These creatures usually cost one or two mana and often have haste so they can deal damage immediately
The only way to open up a gold chocobo from a sealed WotC product is a Final Fantasy collector booster or Final Fantasy Bundle: Gift Edition which includes one collector booster
I've chosen to spend a little time testing Acrobatic Maneuver because I like the fact that it replaces itself which is an important feature as I alluded to earlier

Madison Li Dynaheir, Invoker Adept Elsha of the Infinite Elsha, Threefold Master Gandalf of the Secret Fire Gavi, Nest Warden Ghost-Spider Gnostro, Voice of the Crags Hinata, Dawn-Crowned Jodah, Archmage Eternal Kasla, the Broken Halo Kate Stewart Kilo, Apogee Mind Kykar, Wind's Fury Leori, Sparktouched Hunter Liberty Prime, Recharged Narset, Enlightened Exile Narset, Enlightened Master Narset, Jeskai Waymaster Nia, Fabled Skyclimber Numot, the Devastator Optimus Prime, Hero Pramikon, Sky Rampart Ruhan of the Fomori Saint Traft and Rem Karolus Satya, Aetherflux Genius Sevinne, the Chronoclasm Shiko and Narset, Unified Shiko, Paragon of the Way Sokka and Suki Sokka, Tenacious Tactician Tetzin, Gnome Champion The Archimandrite The Face of Boe The Golden-Gear Colossus Vadrok, Apex of Thunder Vadrok, Apex of Thunder Zedruu the Greathearted Zinnia, Valley's Voice Zurgo and Ojutai owyn, Shieldmaiden