Little blob of gray goo
|Little blob of gray goo|
Veins bulge at your temples as you mentally command the nanobots in your brain to destroy your opponent. They dutifully stream out of your ears and swarm toward your foe, treating you to an exceptionally disturbing display as its cells are disassembled into their component atoms -- starting with the skin, then muscles, skeleton, organs... soon there's nothing left of your opponent but a blob of gray goo on the floor. Gray goo that unexpectedly begins to ooze toward you and attack. I guess being painfully disintegrated causes one heck of a grudge.
Some of the blobs atoms bond with some of yours, removing them from you. (This doesn't heal the blob, because the combined atoms form things like carbon dioxide and methane, and float away.)
Some of the blob's atoms try to bond with you, but you just aren't interested.
The blob flails at you ineffectually with a clumsily-extruded tentacle.
The blob tries to dissolve some of your skin, but misses. Whew! You were worried about your tattoo for a second there.
The blob tries to punch you, momentarily forgetting that it doesn't have a fist any more. Assuming it ever did.