Unstable Anomaly

Unstable Anomaly is a  passive skill, unlocked at level 60.

In-game
Unstable Anomaly, for quite obvious reasons, is a mandatory passive for Hardcore characters.

60 seconds recharge time is unaffected by the Cooldown Reduction attribute, regardless of source, but is reset if the Wizard dies naturally.

Unlike other similar abilities, it does not heal the character back, even to 1 Life. Instead, it prevents the attack that would otherwise kill the hero, as if it has never even happened, and shields them afterwards.

Knockback radius is approximately 60 yards, farther than any other Knockback effect in game, enough to send all nearby enemies flying (often into the walls) and free enough space for the Wizard to escape.

Life-saving effect of Firebird's Finery set triggers before the Unstable Anomaly.

Trivia

 * The flavor text may be a reference to Zhar the Mad, and specifically to the character's quote upon killing him.
 * The skill narrator's name appears to be a reference to Blizzard Entertainment community manager Micah Whipple, better known as Bashiok.