Diaboli : Void

Diaboli : Void multiplies its parent's odds by exactly one hundred: 1 in 100,400 against Diaboli's 1 in 1,004. That puts it in the Legendary tier, about 10,040 rolls at 10x luck. It was added in Era 2 by SuperWhyFly, noellzies and Fr4wie, and the wiki says you find it by clicking Diaboli in the collection, because it is a mutation of it.

The red of the original turns purple. A V-shaped purple icon pulses in color and shape at the center of the torso, the player's right arm covers the face as in Stormal : Hurricane, and a thick bright purple mist hangs over the upper half of the body. A purple and black portal revolves around the player, giving off thin black, white and purple lines that climb upward, while purple stars sparkle and vanish in a split second. The cutscene is the standard Legendary one, a dark reddish-pink star expanding before the edges glow the same shade and the screen cracks to reveal it.