MTGA:

You need

4 Mythic
41 Rare
22 Uncommon
7 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):

4 Death's Shadow
4 Dragon's Rage Channeler
4 Orcish Bowmasters
4 Brainstorm
2 Fatal Push
4 Lightning Bolt
2 Spell Pierce
4 Mana Drain
2 Sauron's Ransom
2 Dig Through Time
4 Thoughtseize
4 Mishra's Bauble
1 Island
2 Bloodstained Mire
4 Polluted Delta
4 Flooded Strand
1 Mystic Sanctuary
3 Steam Vents
1 Undercity Sewers
3 Watery Grave
1 Blood Crypt

1 Lurrus of the Dream-Den
2 Fatal Push
2 Surgical Extraction
2 Aether Gust
2 Mystical Dispute
2 Mind Spike
2 Pithing Needle
2 Roiling Vortex