Invincible

, Tenka muteki ki, lit. An Unrivaled Attack Beneath Heaven (天下無敵斬) is Fargo's Level 7 Tech, and is apparently a skill which he has forbidden himself to use when his wife Zelbess died. To obtain it, the Magical Dreamers side-quest must be completed.

Description
In this tech, Fargo is shown to use his sword to slash the selected target a total of four times, each time causing a calligraphy painting of the four Kanji characters, "天", "下", "無", "敵", to form. A large sparkle will then be observed to be centered on the foe, causing it to spin about its axis before toppling to the ground.