All players draw three cards face up. Realms go to the Abyss. The icon level of all other cards are tallied for each player. The player with the highest number gets to keep his cards; all others are discarded. (Harmful)
Copyrights:
TSR
Wizards of the Coast
The three cards are drawn face up with any realms going immediately to the Abyss. The remaining cards are checked for icon levels. Each player then adds the icon levels of the cards drawn and the player with the highest total places the cards in his hand, all other players discard the remaining cards. If there is a tie for highest total icon levels all players discard the cards drawn. Cards drawn form Three Card Monte may not be played until after they are added to the hand.
One of the most fun cards to play in all of Spellfire, Three Card Monte can also be devastating to your opponents. Combined with the event Espionage! (18/BR) your opponent can quickly be dealt a near fatal blow by placing his 3 best realms on the top of his draw pile and then sending them to the Abyss. Be warned though, there are few ways to protect yourself from disaster too, your objective here is to do more damage to your opponent then yourself.
Some cards that that can help protect you are Marco Volo (50/3rd) and Ren's Crystal Ball (451/4th) to help you time playing the event and Calm (400/3rd) to eliminate any risk at all. Of course, if you Calm the event you also negate the possibility of adding extra cards to your hand.