If I control multiple end step triggers (the delayed triggers not the ones that create delayed triggers) from Marchesa, the black rose do I get to chooses how those are placed on the stack?
If I control multiple end step triggers (the delayed triggers not the ones that create delayed triggers) from Marchesa, the black rose do I get to chooses how those are placed on the stack?
Yes, the following rule still applies.
603.3b If multiple abilities have triggered since the last time a player received priority, each player, in APNAP order, puts triggered abilities he or she controls on the stack in any order he or she chooses. (See rule 101.4.) Then the game once again checks for and resolves state-based actions until none are performed, then abilities that triggered during this process go on the stack. This process repeats until no new state-based actions are performed and no abilities trigger. Then the appropriate player gets priority.
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Why bother with mere rulings when so many answers can be found in the Rules?
For the purposes of putting triggered abilities on the stack, delayed triggered abilities are no different from most other triggered abilities. When two or more triggered abilities (whether or not any of them are delayed triggered abilities) would go on the stack at the same time, "each player, in [Active Player, Nonactive Player] order, puts triggered abilities he or she controls on the stack in any order he or she chooses" (C.R. 603.3b; that rule cites C.R. 101.4). See also this thread.
Marchesa's end step triggers