After Rhea saw the gate she couldn't get her mind off it, and the fact that her mother wanted her to stay away. She wonder the whole day, what saying could be so depressing and destructive that her own mother! Wouldn't want her to see it?
So like you would expect any kid to do who's mother told them stay away she snuck off to the old gate.
When she got there she noticed that now there was a new lock on the gate, it didn't look rusty like the rest of the gate, it was new and very shinny. She said to her self "why does mother want me kept out so badly?" So she searched the gate and noticed one of the bars was loose so she broke it off and when inside.
"Hey this is my old play house, I haven't been in here for years I'm surprised it's still standing!" In the middle of the house she noticed a short pillar with a wide plaque on it, with a little help from the moonlight peeking through one of the wholes in the roof she could read what it said, it said On the night of the blood red moon two children will be born to two kingdoms one will be the symbol of life, love, light, and prosperity and the other will be a symbol of death, hatred, darkness, and poverty there will be a Great War between the two kingdoms and in the end the light will win in an unexpected way.
After reading that's she said " I'm one of those children and I will be in a Great War, and what the heck does light will win in an unexpected way this makes no sense." "Now I see why mom didn't want me here." " I'm going back to my room." So she walked back to her room and pondered what this all meant?