Download or copy a list, then in MTG Arena open Decks, click Import (it reads your clipboard) and craft the missing cards from the deck builder.
Log in to copy or download the deck lists
Kerub, our corgi berserker on guard duty, only hands the deck lists to verified Cardmoor members. Getting past him takes a minute or two.
Mythics
4 cards, 16 copies
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HA3 Mythics
Rares
8 cards, 32 copies
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HA3 Rares
Uncommons
11 cards, 44 copies
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HA3 Uncommons
Commons
4 cards, 16 copies
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HA3 Commons