[1.2.314] Battlemage Job

Looks like you use Revive to summon several of those reapers. They roam around the platform you summon them on and attack.

Also when you use Cyclone, seems like you gain a 100% avoid.

From what I've read so far, Revive probably works this way (Takebacker, correct me if I'm wrong):

To start off, you cast Revive. The buff icon appears on the top right corner of the screen but nothing is summoned. When you kill monsters with the buff on, you have a probability to summon a Reaper. This Reaper will roam the platform it was summoned on until the buff runs out, attacking monsters with a chance of killing them instantly (provided it's not a boss). An infinite number of Reapers can be summoned as long as the buff remains active.

Imagine using it at Entrance to Spooky World. The darn place will be flooded with reapers! O.O