when both players have a Kambal, Profiteering Mayer in play and player A casts a Dedicated Dollmaker and targets either Kambal, the player who casts the Dedicated Dollmaker appears not gain any life in the stack that follows but does lose life in the stack that follows, and it appears that Player B does not lose any life in the stack that follows but they do gain life in the stack that follows. This makes the situation of whoever casts the Dedicated Dollmaker will only lose life while the opponent only gains life, i.e. the dollmaker caster is committing suicide.