Chemmunity: a collaborative chem project where no suggestion is too dumb

[Superlagg]

Biodymium Ferrofluid

Forms a pile of goo that slowly moves toward anything that was at one point alive. When it reaches its target, it makes their clothes dirty and, if removed, starts creeping along after other creatures.

Can be applied to other items to make those things seek out nearby people. Great for heat-seeking plasmaglass and pipebombs.