Knights Who Say Ni

Creatures you control have fear.
Whenever an opponent casts a creature spell, put
a 0/1 green shrubbery token onto the battlefield under your control, put a
0/7 tree token onto the battlefield under your control, and a 2/3 blue herring token onto the battlefield under the opponent's control.
We are the Knights who say Ni! And we demand a shrubbery.