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Pretty simple, really: this thread does what it says on the tin. Wghat is the Gene Worm, aka the big green thing, the boss at the end of Op4 or "Stupid mother**cker! Die already!". It seems to be just a big green random monster but considering that A. Shock Troopers come from it's belly, B. It's the final boss, and C. according to what I like to call 'The Freeman Archetype' it is the Race-X equivalent of Nihilanth. Is this true? Is it just a big monster or some sort of ruler of the Race-X? Or maybe some huge Primarch creature.