*The cylinder fades away from the islands in the mist of the home dimension of Arch and Etheran. And reappears on the mountain that Canterlot would be built on, tens of years before the first ponies would've climbed it.*
Hmm. Interesting. (Walks in and through the passage) *A small group of scientists appear with a faint melody that resounds around the mountain. With a distinguishable "Lu Li La" interlaced in the melody.*
Clockworker: We will be building a construct able to channel immense power and resist the ravages of Time. Arch: (starts using magic to reinforce the cave walls and build enchantments to prevent anyone from seeing into the cave using magic or from happening upon the cave)
Can't have anyone like Silver or Daring Do, or anypony getting in here. (Embeds a feeling of raw terror into the cave, enough to scare, more than likely, even the princesses)
Etheran nodded, then frowned. "I don't think the fear is going to help. it would just make Silver think he had to come in here to investigate"