The Spread Shot of Merlin Prismriver from the world shrouded in scarlet mist. She shoots out musical notes in a criss-cross pattern while playing a cheerful melody. There are tales all over the world about rivers crossed in the afterlife. While the first rivers you might think of are the Sanzu River or the River Styx, some of them aren't dark or scary at all. In some Western cultures, there are tales of shining rivers of joy that grant salvation to departed souls. Standing on the bank of such a river would surely make you burst into song.

The Focus Shot of Merlin Prismriver from the world shrouded in scarlet mist. She shoots out joyous sounds from her trumpet spirit. Since ancient times, people have always known that music exerts a kind of spiritual power. Music is an integral part of religion, and even if it wasn't, no one can deny music's ability to incite mania and passion. Music can also serve a similar role to medicine or friends by supporting people through times of emotional distress.

A Spell Card of Merlin Prismriver from the world shrouded in scarlet mist (a Touhou LW original). This attack will later become "Nether Trumpet: Ghost Clifford." While poltergeists are more stable than phantoms, they are still spirits, so presumably, they are also easily influenced by temperament. Yuyuko and Eiki (and Yukari) probably chose to send the poltergeists to investigate because they would act like canaries in a coal mine. They planned to infer the current state of the incident by seeing whether the Prismriver Sisters were affected by anything on their journey. The sisters also decided to use their own Spell Cards as a kind of litmus paper. The Spell Cards crafted by these talented musicians and composers were stained scarlet.

A Spell Card of Merlin Prismriver from the world shrouded in scarlet mist (a Touhou LW original). This attack will later become "Noise Sign: Soul Go Happy." Generally speaking, dreams are more frequent and leave a bigger impression the younger a person is. Most people can vividly remember having various dreams as a child. However, as you become an adult, they lose their purpose. This isn't because adult society is all gloom and doom but because there's no point seeing dreams when you have to keep up with reality. Or maybe adults just get more tired.

The Last Word of Merlin Prismriver from the world shrouded in scarlet mist (a Touhou LW original). This attack will later become "Great Funeral Concert: Spirit Wheel Concerto Grosso - Wondrous." It is believed that the Prismriver Sisters managed to discover at least one of the causes behind the prolonged incident. However, they lost their memories, and so they weren't able to bring the truth back with them. Merlin planned to only record the important details in her Spell Cards, but all the new info far exceeded their storage capacity. Left with no other option, she filled her Spell Cards up with as much information as she could... but when the sisters got back and examined them, they were speechless. Most of the data was utterly worthless. Devoid of the necessary context, the words devolved into mere strings of indecipherable code. However, not all hope was lost. The Spell Cards still contained a few coherent clues.