'Light weight?' Lain thought, before getting up and double tapping on the sofa's image inside the holographic screen.
After doing this, he then grabbed the left edge of the sofa with his left hand before gently pushing it towards his right. The moment he pushed on the sofa however, he immediately realized how light the sofa really was.
It was almost as light as the stone key in his hand, even though the sofa was much bigger. Just a gentle push caused the sofa to jeer sideways very easily. He even felt embarrassed of himself for using so much force. Feeling embarrassed, he quickly moved the sofa back to its original location.
After letting go of the sofa, Lain then looked back at the screen that followed his every move and always hovered in front of his body, and double tapped on the sofa again, in order to lock it in place.
After doing this, he then grabbed the sofa a second time in order to push it. This time, however, the sofa didn't budge a single inch. Noticing this, he began adding a little bit more pressure to his left hand, trying to forcefully move the sofa.
As he began pushing with more force, the runes on the chairs slowly started to light up. The more he pushed the brighter the light they emitted, until the runes in the entire room started shining in a bright, bluish glow.
After pushing with more than twenty percent of his normal strength, the holographic screen in front of Lain started to shake, as it began to blink in and out of existence repeatedly, until it disappeared completely from sight. After its disappearance, the light inside the room also gave out, causing the entire room that he was within, to go dark.
Noticing this, Lain immediately gave up pushing the sofa, and released his grip.
"What an interesting magic. These runes have made the sofa almost immovable. I may need to use more than 50% of my normal strength just to make it budge." Lain said out loud in wonder, as he looked around at the dark room which had lost all source of light.
"It truly is. But as you can see, there's a cost to this. The energy within these runes, that's connected to the entire house, will be depleted if you use all your strength. You'll then need to buy the right type of blood from the market in order to replenish the energy within them. Otherwise you will never be able to use the various features of the house again." Annette stated, while smiling at the dumbfounded Lain.