A very small wall with good coordination of elements. Post ID of bomb that breaks through in comments
Comments
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wait! MERC is semi-hemi-demi-indestructible! it also will expand if heated!
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Ourous: gpmp is an illegal element.
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1162616 Not sure if it counts, but you end up with a pool of superheated mercury, and a hole almost straight through the wall
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you shouldnt put uran cause once you get through the uran the whole thing explodes depending on the bomb but mine smashed through