2 Removed some repeated words
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You can buy 2 cards costing three runes each, but not because you get "change". 

When you play a card worth 2 runes, what that does is adds 2 runes to the pool of runes you have available to spend. So when you play 3 cards like that, you now have 6 runes in the pool of runes to spend. It no longer matters at all how the runes got there. So you can now youYou have 6 runes to spend, and you can spend them however you like.

You can buy 2 cards costing three runes each, but not because you get "change". When you play a card worth 2 runes, what that does is adds 2 runes to the pool of runes you have available to spend. So when you play 3 cards like that, you now have 6 runes in the pool of runes to spend. It no longer matters at all how the runes got there. So you can now you have 6 runes to spend, and you can spend them however you like.

You can buy 2 cards costing three runes each, but not because you get "change". 

When you play a card worth 2 runes, what that does is adds 2 runes to the pool of runes you have available to spend. So when you play 3 cards like that, you now have 6 runes in the pool of runes to spend. It no longer matters at all how the runes got there. You have 6 runes to spend, and you can spend them however you like.

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source | link

You can buy 2 cards costing three runes each, but not because you get "change". When you play a card worth 2 runes, what that does is adds 2 runes to the pool of runes you have available to spend. So when you play 3 cards like that, you now have 6 runes in the pool of runes to spend. It no longer matters at all how the runes got there. So you can now you have 6 runes to spend, and you can spend them however you like.