Wyvern Lord

In Sword of Seals, Blazing Sword and Path of Radiance, Wyvern Lords are flying units that have higher HP, Strength and Defense stats, despite their Speed and Skill disadvantage when compared to its Falcoknight counterparts. They also originate from Wyvern Riders.

In the first two games, you needed to use an Elysian Whip or a Master Seal on a Wyvern Rider of level 10 and above. In Path of Radiance, you can also wait until a Wyver Rider reaches Level 21. Also, in the GBA Fire Emblem games, once he has attacked, they cannot move again, while its POR and Radiant Dawn cousins can. Finally, in these five games, wyvern lords can wield lances and they secondary weapon changes from game to game. (swords in Sacred Stones, axes in Path of Radiance and Radiant Dawn)

Sacred Stones
You can still use an Elysian Whip on Cormag under the same conditions as you would in FE6 and 7, at the exception that you have to choose between a Wyvern Knight and a Wyvern Lord.

Path of Radiance

 * Shiharam - the father of Jill Fizzart and the boss of Chapter 20
 * Haar - the second-in-command of Shiharam; it can also be recruited in Chapter 23 and he fits the Sirius archetype for Path of Radiance
 * Gromell - the boss of Chapter 25