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.
Ulamog, the Ceaseless Hunger
Norin the Wary
Inspirit, Flagship Vessel
Strefan, Maurer Progenitor
Gisa, the Hellraiser
Gollum, Obsessed Stalker
Clavileño, First of the Blessed
Ishai, Ojutai Dragonspeaker
Jeska, Thrice Reborn
Sephiroth, Fabled SOLDIER // Sephiroth, One-Winged Angel
Iroh, Tea Master
Jin-Gitaxias, Progress Tyrant
Octavia, Living Thesis
Farideh, Devil's Chosen
Gandalf, Westward Voyager
Sharae of Numbing Depths
Hazoret, Godseeker
Gwenom, Remorseless
Isshin, Two Heavens as One
Doran, Besieged by Time
Satya, Aetherflux Genius
Niv-Mizzet, Ghost Counsel
Y'shtola, Night's Blessed
Tergrid, God of Fright // Tergrid's Lantern
Karametra, God of Harvests