Same set:
1) : - AAB -> ABC
2) : - AB -> AC
3a) :+(1:2, 2:3, etc.) - AB -> AA
3b) :+10Gems/Emoticon/Background

Different set:
4) :+ - Unless the card offered is far greater in value.

Foil card:
5) Offer.

Bot will only handle 1:1 trading. Post a comment here for trading related to rule 3, 4, 5.

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