In the story I am currently writing there are extremely mutated krata called kraces.
These creatures were released on spherus magna and hunt all living things. When they find a host they latch onto its back and mutate the host until they are extremely deadly and dangerous. When they are cornered or wounded they will burst releasing egg like spores which will infect whoever comes in contact with it with a deadly virus that slowly kills the carrier and grows new kraces inside the carrier.
Ok so into the moc the tail portion was slightly inspired by the Zyglak moc by @The_Wanderer. It looks a bit messy and hard to see details because of my bad lighting but it looks better in person. So here is the infected Skissul