E.N.D

E.N.D also known as 10,000 Dark Deeds is the powerful demonic weapon created by Dark Ichiro's dark creation abilities while he was sealed by Kaos inside of Ichiro's mind. While the weapon isn't recognized as a official demon weapon of myth, the axe is said to be a mid-tier demon weapon and grows stronger, the more Dark Ichiro cuts with it and wills his demonic energy into the axe. Overall, even Ichiro has admitted that this weapon to be much stronger than the spear created by his own dark creation power.

Appearance
E.N.D takes the appearance of a mid-length dual-edged axe with dark red eyes and a wide grin between the two edges only adding to the creepy and dark aura radiating around the weapon. The handle is shown to be rather long, almost 24 inches in length. Despite it's size, the axe is rather light as Dark Ichiro is shown capable of spinning it around and throwing it as needed. The axe also has multiple serpent-like designs running down the handle and ends with a dragon-claw like blade.

Summary
The axe was created after a small talk between Kaos and Dark Ichiro, while Dark Ichiro was being sealed inside of Ichiro's mind with Kaos declaring he would never allow him to use his sacred gear, accepting this challenge he used his dark creation ability to create a axe and added his own demonic energy and some of the dragon energy Ichiro was radiating with his fight against Stein's Nest. It is shown to be a powerful axe made up of Ichiro's negative thoughts, hatred, and savage emotions

Powers and Abilities
The axe is shown to have a very powerful swing, as one swing was capable of breaking through multiple walls in the abandoned church, even pushing back the Occult Research Club. What the axe lacks in precision, it makes up in raw power as Dark Ichiro was capable of releasing shock waves of demonic power from the axe that caused Raynare to collapse even when she wasn't cut. When Dark Ichiro hits the blade against the ground, by adding his demonic energy through the weapon it could create even more powerful shock waves, that spread around rather than going in one single direction.

Being a mid-tier demonic weapon made up of Ichiro's soul, the weapon is shown to be immensely effective against angels and fallen angels, and having slight dragon-slaying properties can be effective against dragons to a minor extent.

Trivia

 * The nickname was based off of Juuchi Yosamu (10,000 Cold Nights), crafted by Muramasa.
 * The name E.N.D was a reference to Chaos Emperor Dragon - Envoy of the End from the Yugioh Franchise.