TLK Dragonstorm in flight

Dragonstorm is a beastly three-headed dragon, mighty gestalt form of the legendary twelve Knights of Iacon who oppose Quintessa.

At other times Dragonstorm is instead formed from Dragonicus and Stormreign or he is a single, non-combining bot. It is logically unclear why the knights still could transform into the same dragon form after Nemesis Prime murdered one or two of them.