Snake-Eyes Execute Dragon
Full art:

Description:

“This is the form of “Diabellstar the Sin Adjudicator” after evolving into a dragon
Its body structure is similar to Snake-Eyes Flamberge Dragon, with some additional components from Diabellstar”

Branches:

“The branches from the Snake-Eye gradually turn into trees of the White Forest”

Effects:

“Effects from Diabellstar’s weapons”

Source.

Diabellstar the Sin Adjudicator & Diabellze the White Witch & Sinless Sinful Spoils
Full art:

Diabellstar the Sin Adjudicator:
Magical Power:

“The magical power of Diabell-sensei, temporarily brimming with the Forest”

Tail:

“Attaching magic”

Arm:

“Her regular arm is inside the Sinful Spoils arm
Only this part is visible”

Diabellze the White Witch
Body:

Right: “Dress”
Middle: “Supporting the collapsing body”
Left: “Cracks”

Transformation:

“Progressing transformation into a Sinful Spoil”

Earrings:

“Adopted from that person”

Branches:

“The magical power of sensei”

Death spirit

“Death spirit (with the power of sensei)”

Sinless Sinful Spoils
[Appearance] at the time of Sinless Sinful Spoils:

TL note: Unfortunately, the smaller notes are too hard to read.

Source.