Board Thread:Questions and Answers/@comment-68.145.172.9-20130310170754/@comment-5933544-20130310172320

You lock cards for the following reasons: (At least I do)


 * Prevent random trades for that card


 * Prevent accidental usage of that card during enhancing


 * Prevent unwanted/accidental sale (Usually while selling PBDs)


 * Organization

Yes they can be unlocked anytime later.