She tsked at him. Someone clearly wasn't going over his notes from class. You know, that summer course from a half year ago.

"Mana is power, darling. Think of it as, say...electricity." Electricity with a philosophy. "But electricity by itself doesn't do much, you need to put it into something to properly harness that power. That's what spells are; a way to turn that power into something feasible. However, most spells require a specific amount and color of mana to cast. A spell that requires a single drop of black mana cannot be cast with an ocean of blue...and, conversely, an entire ocean of blue mana does me no good without spells that can use it."