Yamao-den (山尾伝)/guide

Saber (サーベル)
Interact with Red Glitch object. From the entrance, go north-west, then interact with the saber between the red snake like creatures to get the effect.

LED
Interact with crystal object to enter in Cyan World, go to the west and go all way on cyan tiles, find on field of cyan tiles cyan simbol like NPC and interact with it to get effect.

Yellow X
Interact with crystal object to enter in Cyan World, go to the north and intreact with box, from that box go to the north and interact with bright-yellow eye thing, next room avoiding chasers go to the north and then to the east and interact with another bright-yellow eye thing, in closed area interact with round yellow monster to get effect.

Ball
Interact with gray wall with red image, in neon world go to the south and a bit to the west to the wall, find on that wall barely visible red image and interact with it, in next room go to the visible red image NPC and interact with it to get effect.