Valansar
From Warhammer 40k - Lexicanum
Valansar, the Breath of the Volcano, is a Saim-Hann Fire Dragon Exarch who was part of Chieftain Fell Winter's forces[1b] when he invaded the Imperium world Dellerax. The Eldar later clashed with Cadian Imperial Guard Regiments, led by Commander Pask, when they came to the world's aid[1a] and were ultimately defeated by the Guard and forced to retreat from Dellerax.[1c]