Just Add Mana
A83/100Web serial by SilverLinings
The more lives you've lived, the more mana you have — and Cale has lived too many lives to count. His core is closer to the magical equivalent of a nuclear reactor. The downside: conventional spells have become impossibly difficult to cast, collapsing under the weight of his own magic. Then he finds himself summoned to a new world with a spellwork system capable of adjusting to his ridiculous reserves, creating new spells just for him. To make spells worth having, that means enrolling at a magic academy. On top of that, an old dragon has taken an interest in him, the kingdom's hunters seem intent on attacking his classmates, and at least one ancient evil appears to have followed him from a past life. With magic back on the table, Cale might finally achieve what he considers the true pinnacle of spellwork: baking.