Board Thread:Online Discussion/@comment-83.89.2.11-20130716085004/@comment-11276487-20131023220008

MignightHawk wrote: However, it was impossible to KILL him without usage of Dragonrend, and Dragonrend is tied to Paarthurnax, who would have been dead if you killed him in ESO.

Not unless you do enough damage before he flys up.