Revision: Adamantium Jets [6]
Abandoning the "rolled up sheets of enchanted Adamantium" design, these Adamantium scrolls can barely be referred to by the same name as their ancestors. They're not carpets, and they're certainly not pegasi, and their not even really scrolls at this point.
Designed from scratch to be a tube, this new design focuses primarily on forcing air through the hollow center to create as much thrust as possible. Most of the effort goes into engraving the spells, prayers, and hymns (which are ever-growing in complexity) on the internal components of the device. It actually features several smaller tubes inside the initial tube, increasing the thrust of the jet-stream of air by quite a bit. We've long since moved past the "disobedient sentience" flaw of preceding flying devices, and these "jets" can be controlled by an apprentice directly.
We upgrade all existing Adamantium War Pegasi Scrolls to these new Adamantium Jet Engines, including Hayat's personal ride. For the Skyskiff (and those who ride the engine directly with a saddle (not recommended)) this doesn't do much, as the limiting factor is the operators ability to withstand the intense wind experienced at these speeds. For the Phoenix and Skyhawk, it should let them fly substantially higher and faster, making it more difficult to be shot down by Arstotzka's rather imprecise artillery. The enchantments are still not permanent, and must be periodically replenished by a mage from time-to-time.
How do you deal with the potential Espionage Credit this year?