Element of Celerity

Element of Celerity was a Legendary Crafting Material in Diablo III. It requires a Character Level of 1 to use, is account bound, and may be stacked up to 1000 times. It was required for the crafting of the Fleeting Strap legendary belt. As of patch 2.0.6., it no longer drops, and existing Elements may be sold for 50,000 Gold.

Its icon was later reused for Bottomless Potion of Chaos.

The item had a chance to drop off the unique Scavengers:
 * Mange (The Weeping Hollow)
 * Burrow Bile (Fields of Misery, A Farm Besieged Event)
 * Dreadclaw the Leaper (Fields of Misery)
 * Shanabi (The Lost Mine, The Precious Ores Event)
 * Armorer's Bane (Watch Tower Level 2, Scavenged Scabbard Event)

Found on those creatures that embody speed, combined with a strong desire to scavenge.