Batgirl/Cassandra Cain

Strategy
From Godfall's Review

The new Cassandra Cain Batgirl is a true testament to power within cards, able to knock off 25% of her opponent's health instantly, and making her a true threat in multiplayer, meaning you'll always want to be above 25% health. That, and her devastating damage stat which is only surpassed by Ares and Arkham Origins Deathstroke, make her a true threat on the field.

Abilities
Here are Batgirl's abilities.

Support Cards and Gear
Here are Batgirl's support cards and gear.

Stats
These stats are the final damage and health levels at LEVEL 50, per Elite Level.