MTGA:

You need

10 Mythic
42 Rare
20 Uncommon
2 Common

Wildcards

Deck list in plain text

After MTGA's update, you can now import normal lists: copy the deck list below. Then open MTG Arena and, on Decks, click on 'Import Deck'.
(Arena language must be set to English):

1 Swamp
1 Blooming Marsh
3 Boseiju, Who Endures
2 Darkslick Shores
2 Cut Down
4 Inti, Seneschal of the Sun
1 Deathcap Glade
2 Ertai Resurrected
3 Go for the Throat
3 Honest Rutstein
1 Vorinclex
4 Plaza of Heroes
4 Relic of Legends
4 Rona, Herald of Invasion
4 Takenuma, Abandoned Mire
1 Blackcleave Cliffs
1 Tinybones, the Pickpocket
2 Titania, Voice of Gaea
1 Vial Smasher, Gleeful Grenadier
2 Xander's Lounge
4 Ziatora's Proving Ground
2 Cavern of Souls
4 Otawara, Soaring City
4 Slogurk, the Overslime

1 Cut Down
2 Duress
1 Elesh Norn, Mother of Machines
1 Ertai Resurrected
2 Glistening Deluge
1 Jace, the Perfected Mind
1 Long Goodbye
1 Path of Peril
1 Sheoldred, the Apocalypse
1 Turn the Earth
1 Aclazotz, Deepest Betrayal
2 Plan the Heist

Paper:

Building 5c Legends should cost you about 540 € (Prices are calculated as mkm price trend ). Here are the missing cards you need to complete it:

1 Blooming Marsh
3 Boseiju, Who Endures
2 Darkslick Shores
2 Cut Down
4 Inti, Seneschal of the Sun
1 Deathcap Glade
2 Ertai Resurrected
3 Go for the Throat
3 Honest Rutstein
1 Vorinclex
4 Plaza of Heroes
4 Relic of Legends
4 Rona, Herald of Invasion
4 Takenuma, Abandoned Mire
1 Blackcleave Cliffs
1 Tinybones, the Pickpocket
2 Titania, Voice of Gaea
1 Vial Smasher, Gleeful Grenadier
2 Xander's Lounge
4 Ziatora's Proving Ground
2 Cavern of Souls
4 Otawara, Soaring City
4 Slogurk, the Overslime

1 Cut Down
2 Duress
1 Elesh Norn, Mother of Machines
1 Ertai Resurrected
2 Glistening Deluge
1 Jace, the Perfected Mind
1 Long Goodbye
1 Path of Peril
1 Sheoldred, the Apocalypse
1 Turn the Earth
1 Aclazotz, Deepest Betrayal
2 Plan the Heist