I went through all 5 difficulties of the labyrinth, collected all the alternative versions of the Aghanim. And got nothing for it. Valve make at least an emoticon as a reward, as
Gyro Build - Aghanim's Labyrinth LVL III SORCERER - YouTube
Gyrocopter - Dota 2 Wiki
Gyrocopter - Dota 2 Wiki
Dota 2 - Gyrocopter
Gyrocopter Mid Magical Build Aghanim's Shard | Dota 2 New Meta Highlights - YouTube
Dota 2 Feature: Aghanim's Labyrinth: The best heroes to navigate through the Sorcerer and Grand Magus tiers | GosuGamers
Gyro aghanim's & basher cancelled black hole : r/DotA2
One person can hold a game of Aghanim's Labyrinth hostage indefinitely by being AFK - you get an abandon and matchmaking ban if you leave. : r/DotA2