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.
Thanos, the Mad Titan
Maralen, Fae Ascendant
Inspirit, Flagship Vessel
Thranduil the Strategist
Tidus, Yuna's Guardian
Scion of the Ur-Dragon
Cosmic Spider-Man
Sheoldred, the Apocalypse
Myrkul, Lord of Bones
Teysa Karlov
Niv-Mizzet, Ghost Counsel
Sonic the Hedgehog
Quintorius, History Chaser
Susan Foreman
The Second Doctor
Orah, Skyclave Hierophant
Ghalta the Immovable
The Space Family Goblinson
Sygg, River Guide
Krang & Shredder
Moseo, Vein's New Dean
Naban, Dean of Iteration
Chevill, Bane of Monsters
Dack Fayden, Helping Hand
Jace, Multiverse Architect