The Fruit Of Preparation.

70 Supreme beasts stood as one in the air while they faced off against him. Their position was not random. They were obviously in some formation of some sort. 

He noticed that the first line was made of warriors with defensive features. Behind them are millions of soldiers of various types created or summoned by the one-man army. This line is also surrounding him right now. The other Supreme beasts have scattered themselves amongst the soldiers so it will be difficult to single them out and kill them.  

He said to them, "I hope for your sake that you have come to me to hand over your rent together and do me the favor of shortening my work."

It is clear that they are here to fight him. The soldiers were already surrounding him so he didn't need to ask. But he asked and they replied. They deployed their domains on him.