Red_Skin_Duck

In the age of Universal Awakening on the Azure Sphere, a myriad of races and gods coexist. 
Devils, dark gods, and monsters descend upon the mortal realm, only to be met by the Awakened.
Howard, during his Awakening Ritual, discovers dual talents— F-rank Mana Recovery, and the supreme talent: Supreme Synthesis. 
He keeps a low profile, hiding as a 'common magus.'
Through countless acts of synthesis, he forges supreme artifacts, supreme skills, and supreme classes! 
Fireball synthesis... Ding! Synthesis successful, attaining D-rank skill— Fire Serpent! 
Fire Serpent synthesis... Ding! Synthesis successful, attaining B-rank skill— Fire Python! 
Fire Python synthesis... Ding! Synthesis successful, attaining S-rank skill— Dragonfire!
When devils invade and dark gods descend, they are left slack-jawed by the Azure Sphere before them. 
"No, this is a trap... a trap disguised as a mere cupcake!"

Talent Awakening: I, the Weakest Awakened, Start with Dragonfire Spell

If the previous booklet harbored Code 19's secrets, safeguarded by a unique encryption, then it was inevitable that Code 19 would prepare a contingency for certain dire situations.

Perhaps in the event of his demise seeking someone to exact revenge? Or if wronged, to seek retribution?

The information within the booklet was accessible and easily interpretable by Code 19 himself, yet he must have also devised a key for those who found the cipher incomprehensible—a means to "unlock the door" for them.

Could this booklet serve as that very key?

Ali picked up the booklet and opened it.

Its pages were yellowed with age, clearly having existed for some time.

The contents were sparse, mainly comprised of symbols and equations.

By identifying a starting point and embarking on a simple deduction, Ali discovered these to be the derivational equations of a spell matrix.

Chapter541-Convergence