Yet he didn't stop Charley from attacking, but modified what it was doing a little bit. He made Charley target the same spot over and over again, like it was digging the ground.
After half an hour, Charley managed to dig a hole of just a couple hundred metres depth. And yet the ground down there didn't show any signs of getting weaker. Instead, William felt the last few attacks left much shallower indentations on the ground.
"Come back," William didn't hesitate to call Charley and let it appear and cover up his chest. After that he took it out again, recharged the exhausted elixirs, before releasing it to continue digging.
After doing this for five more times, William was sure without using such a method like his techniques, leaving a mark at the ground wasn't going to happen. Using normal earth-based techniques wouldn't have done anything at all. Except if a high-end master personally intervened, then no one would have been able to dig the ground.