First, using an anvil, rename a shulker box to Diamond container. Next, put a lot of dirt in it. Then, put it in a trapped chest wired to TNT. Last but not least, wait for someone to open the trapped chest.

Here are two strategies for trolling minecraft players:

first, put down a cake. then, put a redstone comparator down next to it, with the comparator facing away from the cake. next, wire the comparator to 4 blocks of TNT underground, but make sure the TNT is hidden from view. if you had to use more than 15 pieces of redstone wiring the redstone comparator to the TNT , use redstone repeaters.

last but not least, wait for someone to eat a piece of that cake (from a safe distance.)

strategy 2 of 2:

dig a 1-block-deep hole, then put redstone in it, cover the hole with a trapped chest, link it to 2 pistons, and make it so that the pistons will push a redstone block and activate a contraption that will trap a player inside if the chest is opened by linking redstone to where the redstone block will be when the pistons with the redstone blocks activate, activating TNT and 2 pistons that push obsidian, blocking the player’s only exit from an obsidian corridor. DO NOT OPEN THE CHEST!!! (but don’t warn other players about it, either. Also, make sure the redstone is covered up all the way.)

sources:

redstone handbook