Well acording to the test...

The TOAD, most may see this as a humiliating patronus. I mean how are you supposed to strike fear into the hearts of evil with a toad... come on. But this patronus is far from a joke; its wisdom surpasses all, giving it a tactical advantage. And by using its massive and adhesive tongue it can spit it out at the enemy and suck it in, making your nemesis’s come to you. Then subsequently swallows them... thus absorbing there power and saving the day.

I have several times in my life claimed people should eat others to absorb their power, so I guess it makes sense.