During your turn, Kefka has indestructible (Effects that say "destroy" don't destroy that permanent. An indestructible creature can't be destroyed by damage.). At the beginning of your end step, exile a card at random from each opponent's graveyard. You may cast any number of spells from among cards exiled this way without paying their mana costs. Then each player who owns a spell you cast this way loses life equal to its mana value.