Explosive Blast

Explosive Blast is an Arcane spell used by s in Diablo III.

In-game
Upon casting, Explosive Blast charges up for 1.5 seconds and then unleashes an explosion for high Arcane damage around the Wizard. The Wizard can move and use other skills during this period; the explosion occurs at the Wizard's current, not original, location. The Wizard may charge multiple blasts independently, provided they manage to bring the cooldown of this skill below 1.5 seconds.

This spell is very useful when combined with Black Hole or any other immobilizing spell. It is also often chosen for melee builds, coupled with Audacity.

Runes:

 * Unleashed: damage increases to 1485%.
 * Flash: damage type changes to Lightning, and cooldown reduces to 3 seconds.
 * Short Fuse: no charge time, explosion is released immediately.
 * Obliterate: damage type changes to Cold, damage increases to 990%, and blast range to 18 yards.
 * Chain Reaction: damage type changes to Fire, damage decreases to 520%, but releases 3 explosions with 0.35 seconds interval. Proc Coefficient of each blast is also reduced three times.

Non-rune enhancements:

 * Wand of Woh (Legendary Wand): increases damage by 300-400% and each cast releases not one, but four Explosive Blasts, with 0.5 seconds interval (twelve with Chain Reaction rune, one every 0.15 seconds), Arcane Power cost and cooldown do not change.
 * Orb of Infinite Depth (Legendary Source): each damaging cast increases damage done by 8-10% and reduces damage taken by 20% for 6 seconds, stacking up to 4 times. Chain Reaction blasts count as separate casts each.
 * Hexing Pants of Mr. Yan (Legendary Pants): Arcane Power generation and damage are increased by 25% while moving (and reduced by 20-25% while standing still).
 * Delsere's Magnum Opus Set (Set Bonus for 2 items): casting Explosive Blast reduces the remaining cooldown of Slow Time by 3 seconds.
 * Delsere's Magnum Opus Set (Set Bonus for 6 items): enemies affected by Slow Time and 5 seconds afterwards take +12500% increased damage from Explosive Blast.

Obsolete
Before patch 2.0., it was one of the few magical spells in game that used Physical damage, and was very popular as a part of Critical Mass melee builds.