Overkill - Minecraft

Deal nine hearts of damage in a single hit - 30

You will need;

Enchantment Table

30 Levels of Experience Points

Diamond Sword

At least 3 Pieces of Lapis Lazuli

Enchantment Table is crafted with 4 Blocks of Obsidian, 2 Diamonds and 1 Book.

Diamond Sword is crafted with 3 Diamonds and 1 Stick

Experience Points are be gotten through; Smelting, killing Animals, killing Enemies, killing other Players, mining Coal, Redstone, Emeralds and Lapis Lazuli.

When Enchanting, you will need 30 Level of Experience and at least 3 Pieces of Lapis Lazuli; you are looking for the Enchantments of;

Sharpness

Smite

Bane of Arthropods

Doing this will hopefully raise your Diamond Sword to have at least a +9 damage. Then attack an enemy or another player, dealing at least 9 Hearts of Damage in a Single Hit.

Minecraft Diamond Sword