This is my first datapack creation. Not the most efficient thing to exist, but it allows you to obtain a silverfish spawn egg with a simple crafting recipe (pressure plate on top, redstone dust in the middle, gunpowder on the bottom) and to create five special items by naming this spawn egg.

When placed, these will be briefly visible and play one silverfish sound effect before disappearing and becoming silent.

The first is the Landmine. Place it down and when a player walks over it, it explodes. Turn mob griefing off if you wish for these to not damage terrain.

The second is the Hidden Tesla. Place it down and when a player walks over it, lightning strikes the location.

The third is the Smoke Trap. Place it down and when a player walks over it, they will receive blindness and slowness for a brief period. Note: Non-stacking effects.

The fourth is the Shocker. Place it down and when a player walks over it, they will receive the glowing effect and will have a jittering screen for one second.

The fifth is the Trap Reveal, which when placed, will reveal any nearby traps for 30 seconds, but not their type.

The Landmine, Hidden Tesla, and Shocker will all effectively stack when more than one is placed on a single block. Shocker effect will last one second for every Shocker a player walks over.

Here's the command in case you want to turn off a long-lasting Shocker effect: /scoreboard players reset @p ShockValue