So I'm bored and want to make some art so YOU can suggest something( preferably some sort of creature or animal since I'm best at those compared to humans that I'm horrible at) and I will make it and post it here!
Dog Worm
These very small worms get into a human by cuts or wounds and make their way into their hearts. Once inside they grow and feast on their hosts blood as it pumps. Once it grows too large it will unintentionally kill its host by squeezing their heart till it explodes and kills the host. Then it will drink the blood till it has enough to give live birth, as they mate before infecting a host, and the cycle repeats. Dog worms cannot see or smell but depend on their hearing to guide themselves. Their ears are specialized to hear the beating of their victims heart. Their nose can sense the direction of the blood flow in the veins and help guide them towards the heart. Their toe beans have groves that help drag them along inside the veins to head to the heart. On their very long and muscular tail are small hairs that held to grip onto the heart, and on the end of their tails are three spikes to also help with grip. Their mouth has sharp teeth only on its bottom jaw to hold o to the heat while it sends tube like bits into the heart that also have small teeth to drink the blood inside the heart. And it's tongue has small spikes to help tear into the heart. And the chunk on its head helps it to feel it's way through veins.