Mark XV prototype
From Jenny Everywhere Wiki
A prototype Mark XV Clockwork Cherub was once created by the Crew of the Copper-Colored Cupids. It was “mountain-sized”, and ended up wreaking so much havoc on a whole dimension that the Copper-Colored Council of Elders, at least one member of whom had witnessed the destruction, intervened to have the whole line scrapped and make sure the definitive Mark XVs would be much smaller. The Council recalled this incident when rejecting Magnification-236's suggestion to make the Mark XVIIIs very large. (PROSE: The Cupid Suggestion Box)