When they talk about a world of magic, such as the one Jack found himself in, the source of power was obvious: mana.
It was the universal energy that flowed through every corner of the world, an invisible yet tangible force that shaped the very fabric of existence. Mana wasn't just a concept in this world; it was the heartbeat of every spell, every enchantment, every magical feat that was possible. It was this energy that allowed mages to summon storms, swordsmen to strike with the power of thunder, and alchemists to brew potions that could mend the most grievous wounds. It bent nature itself, crafting power from thin air.