The Bat Volley is a powerskill added in the Return to Castlevania DLC. It throws a flurry of moving bats that deal critical damage after passing through one enemy.
Items that greatly displace enemies (eg. Spartan Sandals, Tornado, Hand HookTQatS) can be used to move enemies along with the bats, ensuring continuous critical damage.
The legendary version synergizes well with the Emergency Door.
The bats can travel very long distances, potentially allowing for the use of the Tranquility.
The bats summoned by this skill are considered a ranged attack and therefore work with ranged mutations such as Point Blank.
Notes
Upon activation the player is locked in the animation until all the bats are deployed and therefore it's recommended to use this skill from afar.
The bats are destroyed upon colliding with force fields.