Avatar of Light - A white 3/4 legendary creature token with vigilance and "Creatures your opponents control has -2/-0"
Avatar of Flame - A red 4/3 legendary creature token with first strike and "Whenever an opponent casts a spell or activates an ability, Avatar of flame deals 4 damage to that player or any target that player controls."
"Mutinous Duel deals X damage to each player with the most cards in hand. Where X is twice the number of cards in those players' hands." This looks like a really interesting card, but if I have to nitpick, "where X"-and so on should be part of the first sentence, right? I'm still not entirely sure if those players lose life equal to twice the cards in their own hand or in the hands of ALL the players who are affected... You can probably reword that to be a little bit more clear.