Obtain Invincible from Arthas in Icecrown Citadel.

Obtain The Horseman's Reins from The Headless Horseman in the Scarlet Monastery during Hallow's End.

Owner of Amani War Bear.

Obtain an epic Brewfest mount.

Obtain Mimiron's Head from 25-player Yogg-Saron with no Keepers assisting you.

Earn any variety of Emblem.

Earned the title, "Champion of the Naaru".