What happens if a player has no hand when "Judge" is played?
The player shuffles his or her deck and draws 4 cards (or as many cards as possible if the deck contains less than 4 cards).
Source: Unleashed FAQ (2010-05-13), PUI Rules Team (2010-05-13)

Relevant cards

Note: All applicable cards may not be listed below.
HGSS2_78