Name: The Arcane Fist.

Flagship model name: Harrower-Class Dreadnought.

appearance:

story behind it: Before Jaune/Darth Arcelius was inducted into the First Order, he found this Harrower-Class Dreadnought laying under the Forever Fall Forest after he hid in a cave from the students out for his blood. After he activated the dreadnought, he got sent away from Remnant to the Unknown Regions where a First Order Fleet was patrolling in.