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.
Atla Palani, Nest Tender
Helga, Skittish Seer
The Wise Mothman
Toph, the First Metalbender
Xolatoyac, the Smiling Flood
Kasla, the Broken Halo
Y'shtola, Night's Blessed
Arjun, the Shifting Flame
Radagast of Rhosgobel
The Destined Warrior
Myrel, Shield of Argive
Teval, the Balanced Scale
Abaddon the Despoiler
Baba Lysaga, Night Witch
Xyris, the Writhing Storm
Yennett, Cryptic Sovereign
Terra, Herald of Hope
Uugguu, the Omniplasm
Quandrix, the Proof
Queen Marchesa
Jon Irenicus, Shattered One
Kotori, Pilot Prodigy
Volo, Guide to Monsters
Gimli, Mournful Avenger