The assimilator

From (Minecraft) The assimilator is a dweller that got infected by a parasite making it more deadly then the other dwellers it can also split itself in two. It’s also 6.5 blocks tall, it’s 3 times faster and stronger. (You are a Minecraft player). One day you were walking back to your house when you heard a strange noise coming from your left You looked to see the assimilator look at you. But you’re surprised that it’s not splitting itself in two or running at you.