Kill 100 players in Wintergrasp using a vehicle or a cannon.

Vehicular Gnomeslaughter

Eliminate the remaining Sha imprisoned in the Sealed Chambers and then defeat the Sha of Violence in Shado-Pan Monastery on Heroic Difficulty.

The Obvious Solution

Bow to the Shado-Pan Novices when they bow to you after being defeated during the Master Snowdrift event in Shado-Pan Monastery on Heroic Difficulty.