Argent Charger

Trained to accept only champions of the Light as a rider.

Riding Requirements:

This mount is available to all eligible characters on your account.
Level 10
Apprentice Riding
Paladins only

Source:

Dame Evniki Kapsalis in Argent Pavilion of the Argent Tournament, Icecrown. Requires Exalted with Argent Crusade.
Cost: 100 (reputation discounts apply for some factions)

Notes:

Unlike other Paladin mounts, this charger is not attached to any particular race but can be earned by any who participate in the Argent Tournament in Northrend.
You must have earned the achievement Exalted Argent Champion of the Horde or Exalted Argent Champion of the Alliance on your account before you can purchase the Charger, but as the achievement is account-wide it can have been earned by another character. Your Paladin will, however, still have to earn their own Champion's Seals, which will take some time.

Introduced in:

Patch 3.2

Travel Mode:

Ground (+60% or +100% speed)

Speed depends on your riding skill.

Other Mounts Using the Same Model:

Charger

Thalassian Charger

More info on Wowhead:

Argent Charger taught by Argent Charger