Advance Unit Okayti:
It's called Pontus Stone.
The stone contains the power of huge waves. The path to the Fafurion's Nest is filled with Fafurion's energy. Even Fafurion's own minions can't go through it.
Fafurion gave the stone to Chief Gatekeeper Cyrax so that his men could come to his nest more quickly when he needed them.
When it is moved away a certain distance, the Pontus Stone automatically returns to Cyrax.
"Do you want me to get the Pontus Stone?"