you have to toggle the levers until you get it in the right order.
and when you do, the path will be cleared to be able to go to the other area.
(the rocks that you passed on your way through)
then you make your way to that area and there is a line of
fire coming up through the floor tiles. one of those spots is safe to pass.
it helps to throw down 6 gold in front of each spot until you find it.
then go through the sparkly.
more info is here... just ignore the the part about the drops & rewards
Halloween – Treasures of the Kotl City – Ultima Online (uo.com)
For people who don't know...
you can still activate this spawn to tame the energy platinum & crimson drakes
(they will keep spawning until the timer ends & will remain in there until someone kills
them or they are tamed)