These decks are shared by the community and already available to pick in any game lobby, so there's no need to clone one just to play it. Clone a deck only if you want to customize it or use it as a starting point for building your own.
Esika, God of the Tree // The Prismatic Bridge
Ginger, Queen of Sweets
Sephiroth, Fabled SOLDIER // Sephiroth, One-Winged Angel
Worzel, the Protector
The Unbeatable Squirrel Girl
Solphim, Mayhem Dominus
Ghalta, Primal Hunger
Tahngarth, First Mate
Akiri, Line-Slinger
Armix, Filigree Thrasher
Karn, Legacy Reforged
Extus, Oriq Overlord // Awaken the Blood Avatar
Thraximundar
Purphoros, Bronze-Blooded
Imskir Iron-Eater
Kefka, Court Mage // Kefka, Ruler of Ruin
Silas Renn, Seeker Adept
Rograkh, Son of Rohgahh
Sin, Spira's Punishment
Smaug the Impenetrable
The Mighty Thor, Jane Foster
Nephilim Epochal
Piru, the Volatile
Jared Carthalion