Just to point out the idea of the word " Zeus" not relating logically very well to the second word next to it ,the word "knight" .There is some sort of contradiction ,which leaves the reader in some sort of wondering state of mind ,either to take this seriously or not .
The logo looks better .
Please, elaborate for us on the following :
How are you intending to fight ?
How are you inteding to protect the Earth ?
What type of Mythology are you going to teach ?
My advice is to try to answer to all questions which maight arise ,while somebody is reading your advertisement .
If you are able to menage this ,people will look upon it more seriously .
As for the coven's name ,I think warriors is far more appropriate ,than knights if we consider the historical time and background in relation to Zeus as deity .