The Chimera Snare: Fragments (The Chimera Snare #1) by S & E Black:
 
For Rayshell and her best friend Trish, senior year of high school is going to hell in a handbasket. The feud between Celestine and Daeva is bleeding into their world. When a mysterious visitor infiltrates her dreams, Rayshell is thrust into a realm of profound, otherworldly secrets. Together, Rayshell and Trish uncover the unbelievable – they are the living vessels for two banished Celestine guardians.

Amidst mystical recollections and a wondrous magic system that shatters the veneer of their everyday lives, the two friends embark on a journey against time to connect with the Celestine guardians' allies in hopes of freeing them from their imprisonment. Simultaneously, the shadows cast by Daeva darken. The notorious outlaw, Merisek, has positioned himself to claim dominion over the Order of Existence—a trio of powerful artifacts capable of reshaping reality. Armed with two of these relics, Merisek races against the emergence of the Celestine guardians to claim the third. The stage is set for a showdown that will determine the fate of existence itself.

Rayshell and Trish are all that stand between Merisek and his unhinged desire to twist the fabric of reality into his making. As the threads of destiny unravel, the question looms: who will be the author of existence, and what profound truths will be unveiled in the final, decisive act?