They were ready.
Have you ever seen so many grown men crowded in a single bedroom like medieval elders watching a Queen give birth.
[I say… Is that the head of a boy?]
[Not a chance… Tis' a female.]
Well, that must be how their inputs must have sounded when crowded in the same space watching a woman give birth.
Of course it was necessary for them, in case someone was thinking of switching a phoenix for a chicken.
Well, all 30 men and women crowded about, some standing, some levitating and some seated in wait for departure.
For this Horseman of Death, they took their sweet time preparing, before the big day.
After all, no matter how powerful they were now, the least slip-up from their end could result in failure.
Killing the Horseman was one thing, but ensuring the other creatures didn't know they did it, was another thing.