Great text, man! So, who would be the entity of death "too strong too soon?" And what do you think would have happened if it hadn't interfered at the moment you were delivered? Another thing, being 12 apostles might refer to Christianity, so being above them, "Father, Son, and Holy Spirit," or 3 entities that are essentially 1, could it be the same here?
That's the 7th Apostle/Lord of Dark. Valravn's papa that you see during his fight with MC.
As for what I think would've happened if it didn't kill the 4th's avatar. I assume the 4th would've summoned the Arbiter or whatever the end goal of her experiment was at the time. Maybe she would've killed him or enslaved him for breeding. We actually don't know. What we do know is, the 4th has adjusted whatever she was planning to do there after he reached Level 2 with the Origin awakening. MC is linked to her or her twin, the 3rd. So pretty much, that dead end doesn't really matter anymore, outside of the information it gave. Whatever the 4th wanted to do with MC there, she changed her mind on.
The 12 Apostles don't follow Christianity really. They're Eldritch monsters from a higher plane of existence. There's 12 of them, each having a twin that embodies half of an original trait of the Arbiters. Aglaecwif and Valravn give information on this.
So how it goes is, there's 6 Arbiters above the 12 Apostles, which are their children. The Apostles are a set of six twins. Each set being created by a single Arbiter each. They have half of the Arbiter trait as their power.
First set of twins:
1st Apostle - Authority
2nd Apostle - Power
Original Trait - Order
Second set of twins:
3rd Apostle - Body
4th Apostle - Memory
Original Trait - Evolution
Third set of twins:
5th Apostle - Time
6th Apostle - Ether
Original Trait - Infinity
Fourth set of twins:
7th Apostle - Dark
8th Apostle - Light
Original Trait - ???
Fifth set of twins:
9th Apostle - Truth
10th Apostle - Illusion/unknown
Original Trait - ???
Sixth set of twins:
11th Apostle - Destruction
12th Apostle - Creation
Original Trait - ???
We don't know exactly how the Outer Twins fit in currently. They could be above the Arbiters or completely separate. The current theory I have on them, if they created the Arbiters, is that the Arbiters are two sets of triplets. One Outer Twin created Order, Evolution and Infinity while the other created whatever the Arbiters of the 7th through 12th Apostles represents.
It would look like this:
First Outer Twin created -
First set of Triplets
1st Arbiter = Order Trait
Authority (1st) + Power (2nd)
2nd Arbiter = Evolution Trait = Eye (?)
Body (3rd) + Memory (4th)
3rd Arbiter = Infinity Trait
Time (5th) + Ether (6th)
2nd Outer Twin created:
2nd set of Triplets
4th Arbiter = ??? Trait
Dark (7th) + Light (8th)
5th Arbiter = ??? Trait
Truth (9th) + ???(10th)
6th Arbiter = ??? Trait
Destruction (11th) + Creation (12th)
Just as a reminder. This is just a theory from the current info provided. It's not confirmed to be this way. We'll actually get more insight next update, if WW goes in detail about the 7th through 12 Apostles. That's along with finding out the original trait that they represent half of. So for now, it's fine to come to your own conclusion as we're all pretty much in the dark.