Disclaimer: The following methods are all classified as high-level solutions.
Alternatively, if you want to go the "
I-Demand-To-Stamp-Mah-Supreme-Authority-Onto-Ye" route.
1)
Shapeshift:Iron Golem
Self explanatory.
2)
Wish + Magic Damage Immunity( aka, the Nuke)
Everyone is a hostile in the Beholder Lair. Let it rain destruction indiscriminately onto them( even if you can't see them [img]tongue.gif[/img] ).