This decklist comes from CovertGoBlue. You can find more of his decks on his Youtube channel.
Companion
1
Yorion, Sky Nomad
Planeswalkers (4)
4
Teferi, Time Raveler
Creatures (22)
1
Charming Prince
3
Fblthp, the Lost
3
Niambi, Esteemed Speaker
4
Barrin, Tolarian Archmage
4
Brazen Borrower
4
Elite Guardmage
3
Yorion, Sky Nomad
Artifacts (6)
4
Glass Casket
2
Mazemind Tome
Enchantments (12)
4
Omen of the Sea
4
Omen of the Sun
4
Elspeth Conquers Death
Lands (36)
2
Castle Ardenvale
2
Castle Vantress
3
Fabled Passage
4
Hallowed Fountain
8
Island
1
Mobilized District
8
Plains
4
Raugrin Triome
4
Temple of Enlightenment
Cards (80)
Sideboard (1)
1
Yorion, Sky Nomad