The Brain Sucker is a regular enemy in Shadow Hearts found in the Trials at Wuhan Temple Ruins. They are a brown-red variant of the Mutant Frog and have much more distinct faces where their eyes should be.
Frog that turned evil. It attackes monks-in-training and sucks their brains with the tongue that resembles a human hand. The sweat that covers its body is venomous.
There is an amoeba known as ‘brain sucking’ or ‘brain eating’ that if it enters the human nervous system, there is a 98% chance of fatality as it can cause brain hemmorage. There is also an African legend of the Mamlambo (AKA ‘Brain Sucker’) which was reportedly a giant repitle or fish that killed by sucking its victims brains out.