A reasonable analysis, but of course there are some problems (or else you would have solved the room already).
One point you make is that you can use a decoy to kill the mud mother. Unfortunately
Click here to view the secret text
×she'll have to spawn at least once (really twice) between placing the first and second decoys. Because of this she'll either spawn more babies or she'll be blocked off and you can't deal with either scenario.
Click here to view the secret text
×
In that case, I'd recommend thinking a bit more on the point that you made in secret tags, keeping in mind the problem you wanted to use the decoys to solve. For posterity: "Babies? (since it seems to have disappeared)
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If you need to think outside of the box, then you didn't build a good enough box.
[Last edited by blorx1 at 10-30-2014 05:02 AM]