X20 Kaioken is a Super Attack, Transformation obtained from Parallel Quest 09. Kaioken is usable by all races and drains your stamina while increasing the damage of your basic attacks and specials.
X20 Kaioken provides the same damage benefits as X3 Kaioken that drains your stamina faster and allows you to use evasive skills without using stamina until Kaioken expires.
X20 Kaioken increases basic attack damage by 15% while allowing you to use Evasive Skills and Vanishes freely.[1] It is particularly effective when used in conjunction with Tien's Neo Tri-Beam skill, which usually drains stamina.
X20 Kaioken's in-game skill information window.