My Spells Stack Without Limit

[Fake DND] [Mage] "Mages aren't supposed to be like this!" "You're supposed to rummage through your bag for ages before finding your spell components, chant some long-winded incantation, then fire off a fist-sized fireball that I can easily dodge!" "How can you just cast spells like that, and every single one is a spell I've never even heard of!" When I raise my hand, it's not to apologize. It's to say, buddy, you've still got a lot to learn. … After failing to wake up one morning, Li Yalun transmigrated to the continent of Nuoen, a world of gods and fantastical creatures like undead, goblins, dragons, elves, and demons. The bad news was that he had transmigrated into the body of an abandoned baby. The good news was that the city lord found him, and he got a registered city residence. Even better, he also had a System. This System could not only break down any spell, but also recombine and stack different spells. "You've got a targeting reticle. Why aren't you shooting?" "You've got cheats. Why aren't you using them?" [Instant Death Trigger Rune], [Time-Stop Meteor Judgment], [Causal Foresight Correction]… Years later, while other mages were still struggling to reach the limits of their chosen school of magic, Li Yalun had already begun breaking down and recombining high-circle spells, arranging them into forms no other mage would dare imagine.