Change the Game: KoT

Whenever a player declares an attack that player may roll a six sided die if they do deal {x} additional damage to target player, where [x] is the result of the die roll.
Each player now has Wings (Sacrifice 2 lands: Negate all damage that would be dealt this turn.)
Each player now has Nova Breath (Whenever a creature deals combat damage to a creature, it deals equal damage to that creature's controller)