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McNaughton recalled another abandoned experiment, where a map would be divided into two layers. "We just never found a good fit for it," he said. Morris did, however, have some lingering thoughts on a singleplayer mission mechanic that never saw light, where a dam would break and let loose a deluge of destruction. Any time artist would create a unit or model … we found ways to get it into our campaign," said Morris. "A lot of stuff that didn't make it into the competitive mode actually made it into the singleplayer. The unit count was limited in competitive multiplayer for balance reasons, but the singleplayer campaign served as a refuge for cool ideas that needed a home. Ultimately, though, it didn't seem like much was scrapped wholesale or left to go to waste. the idea was that it could bring down an air unit so that Zerglings could jump on it", akin to the Crypt Fiends of Warcraft 3. McNaughton brought up another scrapped zerg unit as one of his personal favorites, one that would "stick its tail in the ground, and then shoot webs up at flying units. When asked what about the unit, McNaughton could only answer with a question of his own: "Do you ever wonder where a Mutalisk shoots out of?" Well, I guess that's something that will always be on my mind whenever I see a Ravager use Corrosive Bile from now on. OK, so I see a proto-Swarm Host, proto-Queen, proto-Changeling, a… wait-what? (Image credit: Blizzard)