Each of the magic circles in the sky correspond to an element.
From the Water spell, Michael conjured a huge blob of water that slowly morphed into the shape of a hippopotamus.
As for the Fire spell, he conjured up a ball of flames that transformed into the shape of a tiger.
For the Earth spell, he chose a snake.
And for the Air spell, an eagle formed out from solid wind.
Each one of those animals could be considered predators of a crocodile and an alligator. Their physiology was basically perfect to handle the two crocs he was fighting against.
But of course, just having a single element wasn't enough. With the other four magic circles, he created pure elements that shot towards a specific animal.
The hippo was imbued with the element poison. Its watery figure soon turned into violet sludge, allowing it to form a toxin that would poison anyone it touched.
