it was explained in more detail in the novel
so basically for sorcerers, knowledge equals power in the most literal sense
Zagan is a one in a million genius that can make sense of any sorcery with just a glance, so his power skyrocket at ridiculous rate after he acquired marchosias' legacy
and the sigil acts as power bank for him
so basically for sorcerers, knowledge equals power in the most literal sense
Zagan is a one in a million genius that can make sense of any sorcery with just a glance, so his power skyrocket at ridiculous rate after he acquired marchosias' legacy
and the sigil acts as power bank for him