Often in the start of games it ends up in a dispel fight, this item gives you just that little bit of an advantage to protect your more needed buffs, + it makes you tiny.
This item is from engineering, World Enlarger - World Enlarger - Item - World of Warcraft - can be used in arena and lasts for 5minutes.
I use this on my mage, damaging spells break the affect however aoe's and polymorphs + spellsteals don't seem to.