Storyverse and the Long Weekend From Hell. STORYVERSE, #5

Storyverse and the Long Weekend from Hell The second Shakespearian war has taken a toll on everyone. Tessa has gone blind from her battle with Abigail, long-dead powers have been dredged into regular use by the war, and monsters are taking advantage of the war's aftermath. It is Tessa's first year at Mount Colour Academy, and she's bracing herself for a chaotic year as the outside world interferes with her studies once more. It doesn't take long.
There's a madman setting up a promotional stunt to sell weapons in the school library, robbing doctorals of their powers. A mysterious note warns Tessa the Ring of Everything's in danger, and The Forbidden Lord Abigail, driven mad by her father's death, enacts her final plan to alter the time-stream and ensure Tessa and her friends cease to exist.  Tessa just wants to graduate, but making it to the end of the year will mean gathering allies from across time and space to save history and protect the secrets of the Ring of Everything and its ability to grant its wearer every fictional power.