commander booster box Legends: Battle for Baldur's Gate art cards—each Collector Booster has a 30% chance of containing an extended Commander Masters Magic the Gathering

They are more than adequate for side loading binders and down the line if you wish to remove the card from the binder and sleeve you will have zero issues

If a permanent that is represented by a transforming double-faced card becomes a copy of a Siege, it will be exiled as that Siege's triggered ability resolves, then it will be cast transformed

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You might want to find room for a Fiery Cannonade in the maindeck, but the general answer upgrade solves a lot of problems for the current stock lists of this deck

Essentially, the spell must be from a different expansion than every permanent you control and card in your graveyard to get the Treasure token