Board Thread:Speculation House/@comment-27415507-20151217175056/@comment-27275832-20151218022120

Most of us are pretty sure that the illusion of Yang and Mercury was Emerald, since it's a little like when they made Coco see Yatsuhashi when he wasn't there. All of the stuff you said here can be attributed to Emerald, except the painting the town, and no breaks part. but the train was just Yang getting her ass kicked since she was tired after fighting all day with no sleep, and she couldn't even hit Neo.

The shattering glass and the jumping teleport she does when Raven shows up are probably her semblance.