Master of Unlocking essentially allows the player using it to "steal" weapons from opposing players. Once this card is played, all other players must reveal the top cards of their respective decks. If any of those cards are weapons, the player who used this Action either gains one of that weapon or simply takes one of the weapon cards revealed. Its effect is optional, allowing less useful weapons to be overlooked. If a weapon is gained however, the other revealed cards must be discarded. Additionally, this card grants the player that uses it +1 Action, allowing other actions to be played if MoU effect is unsuccessful.