Tenebris Trabem

Tenebris Trabem is a Dengen based attack used by Yan. First, Yan gatheres Dengen to the palm of his hand, then he condenses it into a black ball with runes inside it that emits black lightning from it. While the attack bears similarity to Shadow Blaster and Crimson Blaster, it is used purely in a beam form, and the beam is at least 5x as large as Yan. However, since this attack was first seen during The Dark God’s origin special chapter, it's likely the attack is now much stronger than it was when Yan first used it against Yin, who was still going by the name of Drako at the time. But back then, Tenebris Trabem was powerful enough to melt anything it passed over and cut through anything it's dengen touched, except for Yin's Rune Shield.

Trivia

 * Tenebris Trabem is latin for "Darkness Blaster".