Thank you very much for the comments and to debode, it's meant to be like that :S like a hole. But you may be right I could make it square instead. To Misha: yeah I thought about that too, I wanted to use the same texture. The dark portal one but I'll fix better handle.
Oh and yeah this one big brutal blade that is sure to f*ck up anyone who gets hit by it

will fix in-game scrn shot