[quote]1.how do the halo rings have natural land they look pretty artificial and not natural to me.[/quote]You are correct that Halo is artificial. In reality, the land you see is artificial as well. It was placed and terraformed there by the Forerunners who were masters at doing so. You'll find that many of their installations contain landmass and water. [quote]2.how exactly does an energy sword work[/quote]The hilt generates magnetic fields in the shape of the blade. When activated, the plasma rushes along the magnetic shape, filling it in and creating the infamous energy sword. [quote]3.how do gravity hammers produce shock waves when used and how powerful are they[/quote]The hammers are capable of generating high energy gravity fields. They are bone shatteringly powerful. [quote]4. What internal damage would an ODST in full combat armor take from a gravity hammer[/quote]We already can see that the balded side is capable of catastrophic damage. Were it not for Romeo's sniper rifle, he probably would have been cleaved in half. Taking a direct hit from the striking face of the hammer would be instant death.

This is also proven in Halo:Landfall. Am I right?