Editing Spelljammer Helm (section)

=Grand Helm=
Grand Helms are a special kind of helm created by the Red Wizards of [[Thay]] from the [[Forgotten Realms]], and could be seen as midway point between a standard helm and a Series Helm. Grand Helms are designed to be operated by a team of four mages or priests, who pool their collective magical energy - this results in a Ship Rating equal to the collective caster levels of the four helmsmen divided by 4 (rounding up fractions).

What makes Grand Helms particularly unique is that, at spelljamming speed, they partially [[Plane Shift]] into the [[Ethereal Plane]], which doubles their speeed and makes it harder for them to be slowed down by proximity to other vessels or stellar objects - it takes 200 tons to force a Grand Helm'd ship out of spelljamming speed.

This has a disadvantage, however; because the helm is designed to partially travel in the Ethereal Plane, it's actually physically incapable of moving through the [[Phlogiston]]. A ship with a Grand Helm can't enter a portal from a Crystal Sphere into [[Wildspace]], and if plalced there somehow, is stuck like a fly in amber. The only way a Grand Helm'd ship could be moved between Crystal Spheres is if another ship (or an incredibly powerful teleport type spell) ''physically transports them''. For this reason, you are almost never going to see a Grand Helm outside of Realmspace, and even there, only aboard the Quad of Thay ships that they were invented to propel.