Lord of Laws, one of Jupiter's deity cards, permits Jupiter to choose a deity to play a second mortal card in a challenge. Jupiter chooses which card is used to determine the Champion. This raised two questions:
(1) Can Jupiter choose himself as the deity to play a second card?
Yes, he can.
(2) When selecting a second mortal card to play, must the designated deity follow the Leading Domain (follow suit) if possible, or can any mortal card be played?
It follows the normal rules.