Testing
By dawn, the sea folks are retreating as usual. But they are not going normally.
The water level that rose up is being retracted and they are using that very water to carry all the corpses back into the sea along with them.
Sam decided to take advantage of that.
All he has to do is go onto the cliff and jump into that water while the soldiers are distracted with their own cleaning up and he did exactly that. He used full speed on the harbinger to get on the cliff and jumped straight into the water.
But before jumping not only did he put the harbinger away, he also activated earth element fusion and turned into a rock while he rolled up by a boulder.
Even when the soldiers who are in extreme distress saw this 'boulder' falling from the cliff, they are in no mood to care about what it truly was and investigate it.
They are too busy sulking and recovering and went back into the base.