Tome of Dimensions DLC introduces the players to a completely new chapter of Deck of Ashes. Meet Sibyl the Dark Soul – a fifth character joining the infamous band of antiheroes from the original game.
Tome of Dimensions adds new playable character with unique storyline, 100+ new cards to experiment with, and, of course, a variety of new deadly enemies.

Sibyl the Dark Soul. Elven Archer

Her race had disappeared in another dimension long before the humans emerged in this world. Through all the years of her loneliness Sibyl had been looking for a way to get her kin back.

It got harder with a humans around so she used magic to disguise as one of them.
The Rogues could be of some help to her so she joined them. But with the Ash box destroyed and her disguise spell dispelled time started to run out for Sibyl to save her race.
Sibyl the Dark Soul character abilities overview:

Kill shot
Sibyl uses her skill to inflict powerful critical hits with her arrows. She changes the arrowheads to vary their effects.
Lady of the Dead
All is fair in war. So Sibyl uses the magic of her enemies to pave her way.
She’s able to resurrect the fallen as the skeleton minions (their strength depends on the spell power and the level of the defeated enemies). Sibyl can also buff herself and her minions.

Avatar of Fear
Sibyl brings the two new effects in the game – Fear and Hysteria. These abilities are intertwined and should be used thoughtfully by the player. The “scared“ enemies receive tons of damage.