You can get cursed versions of some items when you put the recipes in the crafting table in reverse.
Cursed Diamond Sword: This sword lifts the creature you hit and slams down, causing it to take fall damage, and the name tag "I'm Cursed" appears on its head.
Cursed Diamond Pickaxe: This pickaxe breaks 3x3 fields at the same time.
Cursed Diamond Hoe: Then this hoe sneaking and right-clicks, it hoes the ground. If you right-click without sneaking, it applies bone meal to a 3x3 area. (You must have bone meal in your inventory. Each right click will only remove 1 bone meal.)
Cursed TNT: When this TNT is explodes, it causes a burning effect to nearby entities. Even if they don't die, they will burn.
(The models of cursed items are inspired by content on the internet, but they are all originally created with blockbench.)