The Star Realm is unlike the Material Plane; it is full of dangers, with a non-zero chance of encountering deities.
Love is precious, but freedom is even more valuable. For the sake of life, both can be discarded. To play it safe, Leon didn't rashly head to the Star Realm. Before leaving, he checked the small space within the Sleeve of the Universe to see if the elixirs were adequately prepared. If not, they needed replenishing. The Plane Talisman acquired from the Elf's Treasure Vault was crucial.
After everything was ready, Leon jumped off the viewing platform on the Volcano Top into the sea, then spread his wings and flew up, soaring higher towards the sun and quickly approaching the atmosphere.
The atmosphere is filled with air, and using the Long Rainbow Escape within it still consumes a large amount of mana.
