Recently on my usual EDH playgroup, we had an interaction of which we couldn't tell the outcome for sure.
I had a Massacre Girl out on the battlefield, enchanted with Kaya's Ghostform. I then cast an Altar's Reap, sacrificing Massacre Girl as the additional cost. After resolving the relevant triggered abilities, I had now a Massacre Girl on the battlefield and a delayed trigger that's been created by Massacre Girl's ability.
My turn then proceeds uneventfully until my end step, during which I use the ability from my Conjurer's Closet to 'blink' my Massacre Girl.
Assuming a creature died from the Massacre Girl's latest ETB trigger, both delayed triggers will trigger at the same time: the one created now, and the one created earlier this turn.
Both triggers read:
Whenever a creature dies this turn, each creature other than Massacre Girl gets -1/-1 until end of turn.
My question then is: Will the delayed trigger created earlier in the turn also give -1/-1 to my current Massacre Girl, since it's considered a new object? And which are the relevant rulings for this interaction?