Youyao Brother's Black Fire (I)

Facing nine huge black fire balls, no Devils including Devil Gods would like to challenge them. They still remembered clearly how Baien was killed and the rapidly moving fireballs made them all want to escape.

However, the black fire balls which were wandering slowly just now suddenly speeded up and those which flew out at the very beginning moved into the most densely Devil populated area. The Devils split away instantly and none was hit by the balls.

The fireballs suddenly stopped, which made it even more weird. The moment it stopped, a second black fire ball came close and the two clashed together.

The Devils who were busy escaping were all shocked and they all turned around and posed defensively. What strong power would the clash release from those two scary fire balls?