Spirit Wyvern

Spirit Wyverns are what Shadow Hunter Vol'jin Chieftain of the Darkspear Tribe transformed Rexxar, Rokhan, and Chen Stormstout into so that they could could lead the Troll Batriders into battle against the Kul Tiras forces assaulting the Echo Isles.

Abilities and Statistics
The statistics listed in the unit box are the Spirit Wyvern's stats in the World Editor, as during the mission the unit's stats match up with the stats of the hero that is taking on that form minus abilities, and the buffs from items and abilities. The abilities available to them while transformed are as such:
 * Rexxar wyvern abilities
 * Frenzy: attack speed +40% movement +25% 20 secs
 * Roar: +25% damage 45 secs
 * Rokhan Wyvern abilities
 * Aerial Shackles:Air only root 30 DPS 40 secs
 * Healing Wave: heals target by 215, jumps 4 times each jump heals less
 * Chen wyvern abilities
 * Firebolt: stuns or chance to stun, no info on damage
 * Breath of Fire:area effect cone 150 damage
 * Evasion:15% chance to avoid autoattacks