Everyone's Castle: From the Start, I Summon the Only Troop Type, Angels

Lin Luo transmigrates to an era in which everyone has a castle and becomes a prince. He also activates a God-Tier Design System. All he has to do is draw a design, and he can improve.

As it happens, the lord leaves the castle, putting Lin Luo in charge. Lin Luo only wants to quietly improve and keep a low profile until his father returns.

By chance, a knight gets hold of Lin Luo's weapon design and successfully crafts the weapon. Lin Luo then discovers that he can improve whenever anyone makes something according to one of his designs.

And everyone in the city is a crafting genius???

After that, Lin Luo hands all his designs over to them.

Not long later:

"I actually made a Holy Sword of Light! It can unleash holy light attacks!"

"Haha, I actually made the Elf King's Summoning Staff!"

"That's nothing. I made an Angel-Summoning Staff that can summon angels!"

While all the other castles still thought angel units were just a legend, Lin Luo summoned every kind of angel...

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.