POV Vesuvius:
A bright light erupted within the darkness, brightly pulsing and glowing within the glowing cave of the dragon's mouth.
A single semitransparent circle with a smaller square in it pulsed and glowed, the magic letters revolving around it.
The air swirled and rippled around it as if some invisible vortex was sucking up all the light and air.
'Test number six,' Vesuvius quietly thought, and then a stream of blue and gold fire rushed up his throat.
In a split second, it reached the miniature portal spinning in his mouth, vanishing into nothingness as if it had never even existed.
It was like a water pump, but it sucked in the fire instead.
In the distance, flames burst out of the curve in the space, washing over the black stone, melting it, and turning it into a puddle of magma.
The flames surged, flowing through the portal like water through a pipe.