Invincible
Requires:
- Level 20
- Riding 75
- Horde or Alliance
Movement:
- Ground +60% or more
- Air +150% or more
- Scales to rider's skill
Source:
- Arthas the Lich King in Icecrown Citadel (Heroic)
Notes:
Obtaining this mount grants the Feat of Strength achievement "Invincible's Reins".
Introduced in Patch 3.3
More info: Thotbott | Allakhazam| Wowhead