The Event Post I've Been Meaning to Do

You decide to follow the thin edge around the room. The guide seems surprised, but follows your lead. It's tall and narrow, but you scoot your way along. In your path, you find a Crystal Bath Bomb... better take it with you. Eventually, the path widens and you find yourself in another room full of lava.

Across the lava room stands a flat piece of smooth stone, so level and flat, it is as if thousands of paws had worn it over time. It looks cool to the touch and vaguely important. Surrounding it is a mote of lava, separated only by sharp stalagmites that impale it to point towards the open ceiling. There is no discernible path across. You know you must get there one way or another, but you're not sure you'll be able to go back the same way you came if you cross.

What do you do?