Cage and Harvest

"Net Cage!" I said as I saw it running away.

A net of green fire burst out from the ground and formed a huge dome, confining its running figure immediately.

"Hehe!"

The Grimm Monster did not seem to think much about it as it went toward it without stopping as if believing it will be easily able to pass through it.

BAM!

It crashed through the net of the dome and had to take steps back to avoid the embarrassing fall. 

The repelling force surrounding it did not react as it had hoped when it crashed through the net cage. 

The net is not an offensive method, even the fire covering it is not dangerous, and since there is no danger, the repelling force will not act.

I don't know how this idiot became an Emperor and still not know about the working of protection charms and amulets.