During his lifetime, Rudeus researched and developed various types of magic and magic tools.
And he was considered to have sponsored & funded various researches as well.
•Way of mastering Chantless Magic
It was said that Rudeus Greyrat could use Chantless Magic from his early childhood. His mentor Roxy M. Greyrat improved the thesis on the method of his Chantless Magic and established a proper way of mastering it. The Magic Triumvirate and Asura Kingdom assertively incorporated that method, resulting in the birth of a large number of excellent magicians.
•『Magic Potion』 Mana Recovery Medicine
Silent Seven Star accepted the funds offered by Rudeus and developed a mana restoration drink.
This Magic Potion was developed in order to break the law that bound magicians since time immemorial, namely, mana exhaustion. With the combination of the above-mentioned method, the period of swordsmen being the strongest ended. Not only that, but it was helpful in improving the magician’s social status as well.
•Magic Artificial Arm
The Magical Artificial arm helped a lot of poor people or adventurers who couldn’t receive Saint or King Class Healing Magic.
It’s said that the Magical Artificial arm’s research was funded by Rudeus and created by the joint co-operation of Zanoba Shirone and Cliff Grimoire. The one who popularized it as a medical treatment device rather than a magic tool in the world was Silent Seven Star.
•Magic Armor
It’s said that no one other than Rudeus used the Magic Armor. However, the third daughter of the Greyrat house, Lily Greyrat, inherited its research, and the production of an All-Purpose Magic Armor was completed in K483. It was useful for reducing the amount of casualties during the subjugation of large monsters.
•Magic Doll
Zanoba Shirone received funds from Rudeus and was able to successfully develop Magic Dolls.
Dolls that looked exactly like humans were capable of performing chores, tasting poisons, performing reconnaissance, care for you, and perform various such other duties.
Due to its extremely high price and low stock, the only places that these were being used were at the Royal Palace of the country where Rudeus and his friends lived.
•Teleportation Magic Formation
Silent Seven Star received funds from Rudeus and researched the Teleport Magic Formation in order to resurrect their usage, which was a taboo at that time.
As a result of these formations being put in every nation and country, the need to travel long and dangerous journeys vanished, making travel to distant countries easier and faster.
It’s said that the reason he touched on such a taboo subject was because he looked back on his father Paul’s death in the Teleport Labyrinth.
The one who actually did all of the research was Silent Seven Star, and it’s said that Rudeus simply became a sponsor for her. For some reason or another, the nobles, merchants, and officials of the Milis Church blamed only him as『The Person who broke the Taboo』.
•Encrypted Memoirs
The records of the above-mentioned research were all considered to be written in a 52 volume book in 『Rudeus’ Handwriting』, but everything was written only by him and Silent Seven Star, and was all written in a cypher no less. Because it still hasn’t been deciphered yet, its credibility is low .