Not saying the last two words (I assume these were "Hail Satan" or "So Mote it be") isn't terribly important. It is the intent of the ritual that counts. The reasons why you are dedicating yourself, and that your are truthful in your promis to comit yourself to him and your own spiritual development.
The blood is another factor however, this is important as it not only connects us with both Satan and our fellow Satanists. But it is a show of dedication, showing Satan we are commited to the promise. A free will sacrifice to show the Gods and Satan that we truly mean it.
I feel your dedication was valid. But it is important to add the blood. Perhaps perfoming a Standard Ritual (Not the Dedication/Commitment ritual), and say to Satan that you really mean this, and sign this new prayer with your blood. Remember that it only has to be a little drop, no more. The prayer can be in your own words.
Welcome!
Hail Satan! Praise the True Gods of Old!
-En Haradren Amlug.
--- In , "movarthheft" wrote:
Ok so I wrote the prayer of Satan to devote myself to him and burned it and all, but the only thing I did was forgot to say the last words and I didn't take blood from my finger now will that have any affect on the ritual or am I now successfully devoted to our Lord Satan. -Movarth