I read it more than a year ago.

A guy first has the power to make a transparent round bubble like thing and everything that goes in it or touches it disappears. As the story goes on he can make a bigger bubble.

Then something shows up in the middle of his forehead - I think it was a third eye.

I don't know if I am mixing two manga together or not but I think later on the more power he uses he turns into an ET (alien) looking guy.

  • the bubble like power reminds me of 6 tails jinchuriki from naruto. no idea about that third eye. – Sp0T Mar 19 '14 at 4:49
  • No Naruto to bubble was black. It was from mouth. One I mean comes from the guy hand. – Kunga nyandak Mar 20 '14 at 3:43
  • Sry, don't know, but you could take a look at TvTrops under Void Powers. tvtropes.org/pmwiki/pmwiki.php/Main/PowerOfTheVoid – Lucifer Mar 25 '14 at 6:42

The manga you're looking for is named Tanabata no Kumi. You're not mixing any mangas together, all what you've said is in that one.

Here is the synopsis:

Basically, some humans have the ability to negate a sphere of reality, neatly removing it from existence. This gradually alters their appearance until they become a hideous alien, with a giant eye in their forehead.

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