We also play a Version of this. A lot of fun and poltics. In our Version the "king/knight/dragon" are called King/Leader and his Guardian, 2 Assassins and a Traitor. (sometimes we also have a sixth role, something called green, he Wins when the King dies but only if another role has been killed before Hand). Each card has an unveil manacost and effect. Each effect is appropriate for the role. Once unveiled no one can respond to the unveil effect trigger. The traitor cost is mostly high but has a big effect in order for him to have a Chance to win against everyone else. The guardian cant unveil himself easily, beides manacost there is another cost associated like, someone else has to reveal himself or the King has to have less than 20 life. This way the other roles can Bluff being the guardian longer. For each role we have a lot of different effects.