Destoroyah’s formidability is similar to that of Hedorah’s in it’s evolution through combined microscopic organisms. However, his origin is something disturbing unto itself. Serizawa’s Oxygen Destroyer featured in the first Godzilla film (1954/56) may have destroyed the original Godzilla, but at the cost of mutating something else entirely, as prehistoric organisms akin to a horseshoe crab would eventually combine to create one.