REG, Set-Aside:
"Set aside enhancements are placed in the set-aside area with the cards they set aside. If a set-aside enhancement is played during battle it remains in battle until the end of battle and then is moved to the set-aside area to join the cards it set aside when other enhancements in battle are discarded. When all of the cards a set-aside enhancement set aside have left the set-aside area they were in the set aside enhancement is discarded."
