Snapping willow strikes

Something tiny the size of a bird's egg appeared on the flight path of the scarlet crown hummingbird. It looked like a rubber sac, like something that came out of the entrails of some beast.

The sac exploded instantly when it almost collided with the scarlet crown hummingbird. A thick viscous black-green liquid was produced from it which immediately covered the hummingbird as it was flying downwards.

At the speed it was flying, it was difficult for it to escape getting drenched in the green liquid.

Zou Yi and the rest didn't know what that green liquid was, but they assumed it definitely had properties that could help them with their current predicament. 

His guess proved to be true. The scarlet crown hummingbird that flew so fast that it looked like a blur in their eyes, got a little bit sluggish in its flight the moment it made contact with the green liquid.