Nocturn + Mouthpiece + Conditioning

If a Nocturn is allowed to play a conditioning through another vampire playing mouthpiece, does the action resolve with the Nocturn bleeding at +2, or does the Nocturn just die?

Nocturn
[Ally}
[1 Blood]
Demon with 1 life. 1 strength, 1 bleed.
[obt] Move Nocturn to the ready region when recruited. If this is this vampire's first successful recruit action this turn, he or she untaps. Nocturn can play non-ally cards that require basic Obtenebration as a vampire. Burn Nocturn during your untap phase.
[OBT] As above, and this vampire may perform this action again this turn, with the cost increased by 1 blood.

Mouthpiece
[Action Modifier]
[dom] +1 bleed. You cannot play another action modifier to increase this bleed.
[DOM] Only usable by a ready vampire other than the acting minion. The acting minion may play cards that require basic Dominate as a vampire for the remainder of this action.

Conditioning
[Action Modifier]
[Dominate]
[1 Blood]
You cannot play another action modifier to increase this bleed amount.
[dom] +2 bleed
[DOM] +3 bleed.

Die. He must pay life as cost immediately, so he wouldn`t see resolve of the action.

I can see how that answer can be good or bad, depending on the situation. Thank you for the quick reply!

I have a version of this question.

Nocturn bleeds. Minion attempts to block. Block is successful. Before combat, Nocturn Meth "cycles" a mouthpiece and a conditioning. Nocturn dies. Is the blocking minion tapped?

erewego wrote:

Nocturn bleeds. Minion attempts to block. Block is successful. Before combat, Nocturn Meth "cycles" a mouthpiece and a conditioning. Nocturn dies. Is the blocking minion tapped?

Illegal. If the action was blocked, the action is unsuccessful and blocked [6.2.3], and you can't play action modifiers during combat [6.4].

Just extending Kevin's answer slightly. There is a window after a block attempt is made and before the block attempt is successful where you could cycle the Mouth Piece and the Conditioning. However, the Nocturn would then die before the block was successful and minion attempting the block would not tap.