After you've placed the order, we assign a PRO player with Swift Spectral Tiger item in his inventory. He works according to the agreed schedule and will contact you in-game to trade you Swift Spectral Tiger.
As soon as you receive Swift Spectral Tiger you can learn it from your inventory, and it will become available to all the characters on your account. If Swift Spectral Tiger is the Blizzcon promotion code, you will receive a digital code to redeem at your battle.net account page.