Shinsu Bomb

Shinsoo Bombs are a type of weapon used by Ja Wangnan. He throws one, and it blows up in a cloud of dense Shinsoo.

They are a reference to Poke-Balls, sharing a similar appearence, and a blue top, instead of red. They are bright cyan on the top half, and white on the bottom. They are supposedly quite powerful, although Jyu Viole Grace was able to resist them almost effortlessly.

Trivia
Another reference to Pokemon, SIU's motif for Lero-ro was Pikachu.