How does the Vault work in MTG Arena?
The Vault in MTG Arena is a nifty little feature that rewards you for collecting duplicate cards. Here's the deal: when you get more copies of a common or uncommon card than you can actually use in the game (that's more than 4), these extras contribute towards opening the Vault. Once you've filled up your Vault progress bar enough, you can open it to receive Wildcards, which are super handy for getting the cards you actually want or need for your decks. It's like the game's way of saying 'Sorry for the repeats, here's something to make up for it.'
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I opened the Vault once and was kinda underwhelmed. Yeah, you get Wildcards, but it takes forever to fill up.
Basically, it's your consolation prize for getting too many duplicate cards. Crack it open for some Wildcards.
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