Transcended trasmute cover a big room, Arifureta Vol 11

The workshop was large enough to fit a football field. It also had a bunch of tools that facilitated efficient transmutation, making it the perfect space for a Synergist.
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“Transmute!”  Crimson sparks filled the entire room. They made it look as though the workshop was studded with bright red rubies. The magic circles Oscar had drawn all began to glow as they activated, and Hajime engraved new ones into specific locations to add to the design. Magic circles dotted the ceiling, the walls, and the floor. Once he had finished them, he crafted one massive three-dimensional magic circle to encompass all of them. A second later, the mountain of ore began to undulate.