He created a leaf and placed it on one piece of parchment, then placed the other on top, concealing the leaf completely.
"Treat these two pieces of parchment as spatial layers. The leaf is currently behind the first layer of space, invisible to the naked eye, but still there. Behind the leaf is the second layer of space.
If the leaf was a person, it wouldn't be able to see us in the first layer, nor would it be able to see whatever is hidden in the third layer.
Do you understand this?"
William nodded his head but was slightly confused. "How do we reach the second layer of space?"
"Like this." Riyald called Mana of the Wind Element to his finger and carefully sliced through the first piece of parchment, revealing the leaf behind while doing his best not to damage the figurative barrier to the third layer of space.
William was impressed by his Master's Mana Control, which clearly exceeded his own. "So, you just tear through it?"