Make a wooden machine gun that shoots arrows. It should have recoil and shoot any type of arrow

A gravity gauntlet that can pick up and throw mobs

A teleporting dagger that can blink to a set return location. On hitting an enemy, the dagger will teleport the player behind the enemy.

Make an explosive arrow that causes an explosion on impact

A super laser gun that fires red lasers that will destroy blocks and set fire to anything in its path.

Create an ore tracker compass that you can craft with either an iron, redstone, diamond, emerald, gold, coal, or copper block that when clicked will highlight a vein of that ore