Minecraft: PlayStation Vita Edition

As I understand, in the old worlds the summoner’s mansion did not spawn, so we get the summoner’s egg using a glitch.

I found on Wikipedia that in the “Dark Forest” biome a huge building spawns that looks like a university (I don’t know why, but it seemed so to me). We go into it, look for the summoner (this is a magician who looks like a black priest) and kill him. (most often they are on the 2nd and 3rd floors).
I think everyone knows the next little trick? You can create a world in creative mode, fly around and look for this building in the dark forest. If it is, then save and exit to the main menu. After that, write down on a piece of paper, for example, the world seed (seed number) and create a new world, writing in the same world seed, with this building, only without privileges and in survival mode.
But I found 1 world with this building. Sid: - 9103025520587744391
Be sure to set the biome size to large.