Archon is a Mastery Wizard skill unlocked at Level 30, which transforms the Wizard into a being of pure energy. While in Archon form, the Wizard has access to a powerful set of unique Archon skills.
Disintegration Wave is an ability the Wizard gains access to only while in Archon form. This ability works much like the normal Wizard skill Disintegrate, shooting out a steady beam that deals high damage per second. The Archon version produces a much wider beam that can hit more enemies at a time, and deals much higher damage. The drawback is the beam can obscure the view of incoming attacks, making the Wizard vulnerable to missiles and other ranged attacks, as they can not be seen to be dodged.
Like all spells in Archon form, Disintegration Wave has no resource cost, and can be used indefinitely.
Disintegration Wave is available in all rune effects of Archon, as it's one of the three basic Archon spell abilities, along with Archon Strike and Archon Blast.
A video showing the massive potential of this ability when paired with great equipment can be seen below.
This video is somewhat deceptive as it only shows a few scenes from locations when Archon and this skill is most effective; against slow enemies, without ranged attackers, when there are numerous targets to keep refreshing the duration, etc. That said, it's still an amazing killing spree, especially given that it was recorded less than two weeks after the game's release, when Inferno was still unbalanced and too difficult for most players to survive at all.
The following abilities are only available while in Archon form. Other normal Wizard skills can *not* be used while in Archon, so there is a trade off to this form; much higher damage, but with a limited variety of offensive skills, and little or no defensive/movement skills.