Master of Cruelties Spiteful Returned Combo
This would not work how you want it to. Because of the timing for the different triggers in this scenario.

There are 5 parts of the combat phase:


Beginning of Combat
Declare Attackers
Declare Blockers
Combat Damage
End of Combat


The trigger from Spiteful Returned triggers is "Whenever Spiteful Returned or enchanted creature attacks", this means that it will trigger during the Declare Attackers step. While the Master's trigger is "Whenever Master of Cruelties attacks a player and isn't blocked", this means that it will trigger during the Declare Blockers step long after the trigger from the Returned has been put on the stack and resolved.


  508.3a An ability that reads “Whenever [a creature] attacks, . . .” triggers if that creature is declared as an attacker. Similarly, “Whenever [a creature] attacks [a player or planeswalker], . . .” triggers if that creature is declared as an attacker attacking that player or planeswalker. Such abilities won’t trigger if a creature is put onto the battlefield attacking.
  
  508.3d An ability that reads “Whenever [a creature] attacks and isn’t blocked, . . .” triggers during the declare blockers step, not the declare attackers step.