Plague Ent

I have no idea where the file with the price is located.

DefaultStats.xdb
25
That is, the creature's power is divided by this value, and the result is the price in dark energy.

Added 2 minutes later

Why, of all the dendroids and ents, are plague ents being summoned!

Sincerely, Psatkha

It's strange, but for me, all the new ones are summoned as unupgraded Necropolis troops, and only based on their level.