Not my own, but...

The ability to make the sun go nova.

And for the source of that little gem check out Wild Cards.

A circumstantial one. I've read a novel a while ago where there was that soldier who received an axe blow through the skull. He survived the blow, but would have died in a few days from the wound. There was an herbalist who gathered a few ingredients and concocted a balm he applied on the soldier's wound, not hoping for much. Turned out the soldier fully healed. Not only that, but he acquired a might regeneration power, becoming immortal!

The only problem is that soldier was completely stupid. The only thing he knew was to make war. So he fought them all, from Middle Age through the First and Second World War, doing nothing but hold a sword or a rifle depending on the era.

Of course he tried to repeat the same balm made by the herborist, but it never worked; he thinks the exact composition have to be repeated. It'd be not just "honey", but the honey gathered by a specific species of bees from a specific species of plant, which plant was fed the exact composition of fertilizer...

Ability to talk to tables.

Still pretty useful that. Imagine paratroopers with no parachutes.

O.k. how about...
The ability to tame unicorns

It depends if unicorns exist...

How about the ability to switch your right and left hands with each other at will.

That can come in handy, actually.
Like being able to draw a weapon, pick a lock or handcuffs, etc. when physiologically you couldn't.


The ability to summon large knives and swords which are embedded in your own body.

Hmmm...the power to make an RPG worse than FATAL might count, but it could still be used for psychological warfare...

The ability to irreversibly age yourself as far as you want.

Etymology Man and Sagan Man