Return to the Monster Village

"Wait, wait, wait, I know exactly what you're talking about, but how exactly does it help you learn the ancient language?" Eiro asked confused, and Merlin quickly explained, "Well, that's simple. You interchange the mana held within the carved slab with your own, and as you do so, you study the words as you normally would." 

"...It's that simple?" Eiro muttered, "I've done the first thing quite a bit already, but I just had to study while I was doing it?" 

"Wait, how did you get the idea of doing this already?" Merlin asked a bit confused, "In the first place, how did you find that place? It was hidden away quite well."