Are you a member of a metal band looking for a brutal logo, or are you simply a metalhead wanting to see his/her name in black metal text? You can decide on the main shape (letters describing a pentagram, a square, a skull, etc.), how hard to read you want it to be, images or names of actual band logos you want yours to look like, and many other details.
Notice: i can't guarantee any text can fit in any shape. I would rather suggest not sticking too much to a certain shape, specially if your text is too short, like for example demanding a chtulu face out of a 3-letter name.