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.
Tolsimir, Friend to Wolves
Scientist Supreme of A.I.M.
Alela, Cunning Conqueror
Anowon, the Ruin Thief
Tovolar, Dire Overlord // Tovolar, the Midnight Scourge
Alistair, the Brigadier
Gandalf, Goblins' Bane // Flameshape
Y'shtola, Night's Blessed
Sephiroth, Planet's Heir
Szarekh, the Silent King
Olivia, Crimson Bride
Jared Carthalion
Multani, Maro-Sorcerer
Kinnan, Bonder Prodigy
Giada, Font of Hope
Kambal, Profiteering Mayor
Grizzlegom, Hurloon Hero
Ms. Bumbleflower
Jetmir, Nexus of Revels
Torbran, Thane of Red Fell
Osgir, the Reconstructor
Gallia of the Endless Dance
Kynaios and Tiro of Meletis