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.
Preston, the Vanisher
The Ur-Dragon
Ulalek, Fused Atrocity
Prosper, Tome-Bound
Gishath, Sun's Avatar
Eriette of the Charmed Apple
Noctis, Prince of Lucis
Lyse Hext
Avatar Aang // Aang, Master of Elements
Alphinaud Leveilleur
Alisaie Leveilleur
Sally Pride, Lioness Leader
Namor the Sub-Mariner
Kuja, Genome Sorcerer // Trance Kuja, Fate Defied
Celes, Rune Knight
The Wandering Minstrel
Karumonix, the Rat King
G'raha Tia, Scion Reborn
Cloud, Ex-SOLDIER
Be'lakor, the Dark Master
The Destined Black Mage
Jeska, Thrice Reborn
Sengir, the Dark Baron
Gilanra, Caller of Wirewood
Kydele, Chosen of Kruphix
Ms. Marvel, Kamala Khan
Cosmic Spider-Man