Minecraft/The End

Climbing the Ender Towers
You should make sure you have 200 blocks of dirt, stone, or any object you can stand on. Use them to climb up the towers and after that's over, break the glass and destroy the floating block in the fire.

Repeat that same thing and watch out for the Ender Dragon. The reason you are breaking the floating glass is if he's hurt and he flies nearby, it will heal him. But when you run out of blocks, snipe them with a bow. It's much easier with the sniper bow mod. After they are all broken, fight the dragon. But be sure your not using a sword because even diamond swords don't effect him. It would be pretty pointless.