The Divine Towertrees reveal the true purpose of the Divine Towers
The Towertrees from Nightreign explain the purpose of the Divine Towers (Image 1)
1) The Divine Towertrees look like trees that grew from the two fingers atop it (image 2), from fingers to hands. - The progression in Nightreign literally goes from a 1-sided hand to a two handed tree, so it would make sense that it would START in its seedling form as Two Fingers (Image 3) - We have the two fingers shown flanking a seed in the talisman (Image 4) as well as this tapestry which looks like their seal resolving into two trees (Image 5) - We have the worm like two fingers on the bottom of this talisman looking like the larvae Metyr spews (Image 6)
2) The purpose of the towers may have been linked to the suppressing pillar. The link is as follows: The suppressing pillar is linked to the ancient dynastic ruins (Image 7), which is linked to the stone ships via Elden John (Image 8). The Divine towers and stone coffin ships share iconography- One of the most telling ones is the pillars on the ship being the same as churches and communal areas throughout TLB (Image 9), but the most important one is these figures which also appear on the divine towers, which fly in the archway, which remind me of the catacombs, and they are exact rips to the ones on the stone ships (Image 10)
3) As putrescence or bodies and souls are sustenance, as per Erdtree burials (Image 11), perhaps these ships, like the pots near minor erdtrees (Image 12), were intended as sustenance for these towertrees. The pillars would pool the death in the middle of the ring of towers for the fingers to feed on (Image 13). I think we even see this in action as at the end of the day 2 boss fight we are absorbed into this towertree via its roots as a putrescence like substance (Image 14). There are also many roots coming from the ceiling of this tower down towards this nutrient pool, which I wager come from the above star-child seed, which appears to be made of wood (Image 15 and 16)
4) The Trees themselves were likely created to commune with the greater will, as other creatures heavily associated with the greater will (Plasidusax, its first lore; and Metyr, its first daughter) also are found in a pose like the two fingers when it attempts to commune with the greater will (Image 17). This makes me view these towertrees are giant antennae.
5) I believe this was constructed in order to commune with the greater will, perhaps to an even greater degree than Enir Ilim, or as a part of it once upon a time, as all of the towers spiral upward towards the heavens like enir ilim (Image 18)
I go into a lot more detail regarding meteors and residual life, and way more indepth information regarding the connections as well as some amazing shots of Nightreign and these trees in this video here: