KRASH!!!
Thrown into a wooden desk, visages of what was once people being on their seats, watching him. A green chalkboard being used by two hands, yellow as the sun, holding the white piece as it would scribble and scry the lesson. Harvard would try to get up from the crash he made, dizzy and confused, his vision getting clearer as he'd see what was on the board: Numbers. An algebraic equation with multiple choices, the hands speaking in sign about the lesson, the students taking their notes. Such math before the Card Magician brought him ire, as he'd prepare a spell to cut the distance, letting him skip out and run across the hall. "Nope. Skip that. I am NOT doing Math! Hate! Hate it! Hate it LOTS!!" He'd scream, charging ahead as he tries to explore his surroundings a bit more, hearing a groan behind him and prompting his head to spin like an owl to see what the noise was, his bones cracking due to such an abrupt twist.
Zombies.
The undead rose just as he escaped, having the child run like mad as he watched the horde crawl across the halls, with each touch to the wall transporting them elsewhere. Even with some disappearing, more would still arrive, making the boy ponder how exactly Jesta knew the dead was a perfect choice to act as his personal army, let alone have it exploit Rubix's dimensional structure to ensure he wouldn't escape properly. Such questions would be left for later as he would set up Lemegeton and a spell in the form of a golden sword, the Kusanagi no Tsurugi. He'd look around his environment if any of his monsters were within the school, desperate to cast Fusion for both of his weapons as the mass came after, having him walk on their heads if they appeared in front of him, slashing and shooting down whatever was getting close to him. As luck would have it, one of such monsters came around, watching its body struggle to keep still in order to not be teleported elsewhere: The Angel of the Earth, Haniel. Its slender arms were just enough to weave around and connect with the child, taking notice that him touching other living beings do not inherently cause the switch to occur, nor does the flooring. With such in mind, he'd cast Fusion, his blade and gun blessed by the holy earth, shooting directly at the walls and floor to close it up and prevent the Zombies from going further, having them be teleported elsewhere, a massive hole left onto the school in its place. The child would cheer for a brief moment, before more growls were made, this time being in the classrooms.
He would try to take aim, shooting at the walls once more, but the Zombies were somehow more coordinated. Some would take the brunt and be warped elsewhere as they knock over the desks and the doorway, struck in a way where it would act as a shield against the bullets and force the boy to chop it down, leaving a wide opening for the monsters to attack. As he'd try to back away and jump out through the hole, he could hear something in the distance. A Violin was playing, one with such a melodic tune that it distracted him from the main threats, being tackled by one of the Zombies, having the Card Magician block its bites and slashes with the sword, whilst taking aim and shooting its head off, aiming at the wall of the school once more to box them in. His body began to shift and make wings from his ribcage again, letting the corpse fall on what looked to be an endless view of white, solely so he can find more of his monsters and be prepared properly against the Ringleader.
As he flew and made sure to make as much distance as possible, another sound was being made, one he was more familiar with. A Guttural roar across the empty fields around the side yards, a massive stone creature with red lines encroaching its body. "Uru!" The boy shouted in joy, as he'd fly back down to meet with the spider-like creation, landing on its head, casting his Fusion spell on it to fuse the beast within himself, quickly taking new properties as he'd free-fall and try to reach for the windows, letting it act as his escape as the Zombies piled each other and broke through their own path. His body became stone, akin to his time with Rasca, with his own lines being made of the same color. Lines of the spider being embedded both on his chest and stomach, whilst his wings became that of spider-like legs, a web made to connect them and let him fly just as much. His face was covered in the rock, save for his eyes, where it dons the spider's marking in his pupils. As the boy began to warp once more, he could hear the Violin playing on random pitches and volumes. The louder its piece, the closer he got. The softer its sound, the farther he was. From the sound he heard, it felt to be a memorial piece, his eyes widened and confused. Why play a funeral song? For whom is the song for?
Eventually, he would reach Jesta, finally stopping at what looked to be the inner workings of one's liver, akin to his time being spent in the Bakunawa's gut. There in the center would be a stage, one in which the Ringleader played and pulled the Card Magician's attention further. It was hypnotic, mesmerizing to the ears, a soothing sound that he can't detract away from. The second he got back his bearings, however, by kicking a part of the muscles he was on to make him nearly trip, he'd deafen himself in order to focus back on the task at hand.
Killing the Demon that caused such calamities while they were gone.