Ultraman Omega Episode 3

Ayumu felt disappointed that Sorato's memory loss prevented him from providing clear answers about things she's been curious about. Sorato suddenly senses something and goes out. Kosei and Ayumu join him. The place they arrived at was the remote mountain where Sorato had awakened. Sorato and the others search for something to help him recover his memories, and there, Kosei unearths a mysterious stone. At that moment, dark clouds gather, and a kaiju enveloped in cold air appears from the sky. The kaiju's objective is also this stone! As Kosei is attacked by the kaiju and finds himself in a desperate situation, a blue kaiju wielding psychic powers emerges from within the stone!! (Source: ultra.fandom.com)