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.
Saheeli, Jewel of Avishkar
Edgar Markov
Y'shtola, Night's Blessed
Ms. Bumbleflower
Optimus Prime, Hero // Optimus Prime, Autobot Leader
Megatron, Tyrant // Megatron, Destructive Force
Heliod, Sun-Crowned
Svella, Ice Shaper
Teferi, Mage of Zhalfir
Niv-Mizzet Reborn
Lord of the Nazgûl
Jace, Multiverse Architect
Zaxara, the Exemplary
Denzilore Fatehold
Arcades, the Strategist
Golbez, Crystal Collector
Tazri, Beacon of Unity
Smaug the Magnificent
White Tiger, Ava Ayala
Yusri, Fortune's Flame
Krenko, Mob Boss
The Wise Mothman
Trostani, Selesnya's Voice