Ask how they met Hesperus
We met when I first discovered portals myself. Just as I emerged onto that unknown landscape, blinking and disoriented, I was met by this strange orb of light. Imagine my astonishment when it spoke. For the longest time we only had each others' voices to follow through the dark. But when the boundaries finally shattered, well, it was as though we'd known each other all our lives. If you mean to help quiet this anomaly, look for knowledge stones, my friend. They'll let you know everything you need to direct the portal's flow.
