Thunderstorm

Thunderstorm is a Unique grade grenade in Counter-Strike Online.

Overview
A new grenade used during the Joseon Dynasty, a powerful grenade that can control the burst time using the wick's length.
 * Improved weapon performance when used by Youngshin and Yichang classes.
 * Explosion per right click increases delay by 1 second (up to 4 seconds).

Release date

 * South Korea: 6 February 2020.