The spell the camel had used was a defensive spell. It was a spell that attracted all the surrounding sand around him to create a giant and big shield that would withstand a very strong attack.
However, this spell also stopped the camel from moving because the sand weighed more than it seemed. And to be able to defend the caster, the sand needed to be solidified a little so it could serve as a shield.
So right now, the camel was immobile.
Though, the sand the camel had used was wet.
He didn't notice it since it was still sand and the camel couldn't differentiate it, but it was a big factor to Eden.
This wet sand would be the factor that would turn the fight to his favor, because yes, without something like that, even though Eden was accompanied by the bat and the snake, he didn't think even once that they would be able to win against such a big and resistant monster.