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.
Goreclaw, Terror of Qal Sisma
Jiang Yanggu, Alone
Leonardo, Worldly Warrior
Iron Spider, Stark Upgrade
The Swarmlord
Terra, Herald of Hope
Jodah, the Unifier
Maralen, Fae Ascendant
Aragorn, the Uniter
Auntie Ool, Cursewretch
The Ur-Dragon
Kurbis, Harvest Celebrant
K'rrik, Son of Yawgmoth
Ultimate Green Goblin
Ultron the Annihilator
Zevlor, Elturel Exile
Bello, Bard of the Brambles
Dogmeat, Ever Loyal
Miles Morales // Ultimate Spider-Man
Zur the Enchanter
Korlessa, Scale Singer
Naban, Dean of Iteration
Helga, Skittish Seer
Targ Nar, Demon-Fang Gnoll