Editing Spelljammer Helm (section)

=Dwarven Forge=
Dwarven Forges are a unique spelljamming engine created and used exclusively by, well, [[dwarves]]. Since dwarves in [[Advanced Dungeons & Dragons]] were largely a nonmagical race (some settings aside), they created the Forges to channel the natural creativity and emotional energy of dwarves at work. Whilst there have been experiments in other races attempting to use Dwarven Forges themselves, since the dwarves aren't particularly jealous about spelljamming, they have all failed miserably.

Dwarven Forges resemble large foundries, where dwarves work around the clock in acts of crafting and forging. Through unspecified means, the Forge captures the emotional energy that its workers gives off and turns it into motive thrust. Granting Ship Rating 1 per 100 workers, a Dwarven Forge thereby can only be fitted in large ships; minimum of 100 tons to a maximum of 700 tons.

Ironically, this means dwarven spelljammers are always a case of planned obsolence; starting with an asteroid foundation, eventually, the dwarves will literally strip-mine their own ship to the point there is nothing left to build from; they can't mine any further without cannibalizing everything that's been built up. So the Forge stops working. And as the ship is too big for conventional helms, the dwarves have to pack up and leave, abandoning the site of generations for fertile new ground.