The next rumble caused more lava to flow from the mouth of the volcano. Clark saw the five dwarves that had been working on things doing their best with beasts to stop the lava and harden it, but they had clearly lost control of the situation.
"So they were forcing the energies in to that crown while forging it but they let it get out of hand." This was the answer that Clark came to. Especially the more that he looked at the building danger from the volcano that had clearly been held back. That could only mean that the pressure of eruption had been trapped for too long and would release all at once any moment now.
'Broken Crown of volcanic fury- unique
The experimentation used to create a crown that superseded the crown of magma that the dwarves use to help certain beasts grow to a higher level has failed. The energy requirements of the unique ranked crown of volcanic fury was made with poor materials causing it to break partially through forging.
basically, Clark didn't have to handle the stronger dwarves because they had to survive, he got lucky.