(collectible card games) A hand which is especially suited to a player's needs; an optimal hand.
1997 March 2, Michael Card, “[PTQ Report] Vancouver, BC, Canada”, in rec.games.trading-cards.magic.strategy[1] (Usenet):
My hand is a god hand, and he only has one land.
1998 December 10, Stewart L. Potter, “Re: how to fix magic”, in rec.games.trading-cards.magic.strategy[2] (Usenet):
With Hatred a second turn kill (with a god hand) is still possible if both player[sic] start the game with 100 life.
1999 January 19, daoist [username], “Re: deadly combo at turn one”, in rec.games.trading-cards.magic.strategy[3] (Usenet):
So, when I draw that god hand, I'll go buy the winning lottery ticket, and be struck by lightning, a plane crash and a motorcycle accident within 5 minutes, right? :)