From the Codex of Hidden Lore

[Edi]

Esoteric and obscure, there are tantalizing things in these fragments of lore...

A reference to "Wyrm Lords" said:
"The caster opens his mind and reaches out to dragons and serpents across the world. The calling is strong enough to constantly force serpents, drakes and wyverns to come to the caster in servitude. However, true dragons are not seduced by the call. Instead, they are made aware of the presence of the impostor."