Rule 832.1.c.3
If [Object] is a set of Cards or Game Objects, that set can be composed of Game Objects on the board as well as Cards in hand, as long as the composed set satisfies the Show Off condition. Example: A unit reads in part “[Show Off] five units with different names.” When showing off as part of playing that unit, units may be revealed from hand or picked from among friendly units on the board, as long as the group of units picked and revealed satisfies the specified quality.