Board Thread:Questions and Answers/@comment-68.145.172.9-20130310170754/@comment-5706972-20130716141856

If it is part of your Colosseo deck, you have to:

1. Go into the Colosseo screen

2. Click 'Edit Deck' (may have to go to Main Deck, then Supporting Deck)

3. Remove the card from your line

If it is not in your Colosseo deck

1. Go to the card itself

2. Click 'Unlock This Card'