Metal Spider idea?

[Wind_Master]

This is a cool idea I think. This will be like a moving mine. It cant be blown up (unless a player from the oposing team hits it) but it moves back and forth (10 tiles one way, 10 tiles the other way) only moves left and right though. These cost 20$ and will do about 15 damage. These will be avaliable with every class.

Note: They will look like a spider sorta. (If you need a picture I will try and find one) basically it will look like a spider (8 legs) that is all chromed out and metalized.