Obtain Invincible from Arthas in Icecrown Citadel.

Obtain the Swift Zulian Tiger from High Priest Thekal in Zul'Gurub.

Obtain the Deathcharger's Reins from Baron Rivendare in Stratholme.

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

Obtain a Winterspring Frosaber.