Before entering the End, ensure you have: full diamond armor (enchanted if possible), a diamond sword (enchanted), a bow with plenty of arrows, a pickaxe, a water bucket, a stack of building blocks (cobblestone/dirt), plenty of food, and several potions (healing, strength, slow falling).
Minecraft
Gear and Supplies for the Ender Dragon
Prepare for the Ender Dragon fight in Minecraft with enchanted diamond armor, a sharp sword, a powerful bow, and essential potions for survival in the End dime.