From The Colour of Magic by Terry Pratchett. The protagonist is inside an oak occupied by dryads. He is led down the stairs in the center of the trunk, and arrives in a large hall. The entire tree is filled with a golden haze.
Is there any difference between "would race up" and "raced up" here? Does "would" imply something the simple past wouldn't?The background roar was louder here. Sometimes a pulsing golden glow would race up the translucent walls until it was lost in the haze overhead. Some power in the air made it vibrate.