There was a smile, and a spark in her eyes like forgelight, a half-feral glee that bubbled up as she listened. Posh or no, he got it. "Elemental engine's more or less a bound elemental- big dumb animals, like, made'f planar energy. Once bound, they can be made t'do work for you- bloody powerful, but expensive. So much so it's only posh folk as can afford anythin' what uses it. No offense meant."