Setting "tp @e[type=!player] ~ ~ ~" in the command block (the value of ~ ~ ~ is not important) will transfer all entities to the specified location, but within the range of the command taking effect, placing an ender crystal should be on the command block. However, its position will still be in place (the model is not teleported, normal rendering), mouse click on it, and it will explode on the command block (specified position or value ~ ~ ~). And the explosion that occurs on the command block is against the entity and the player.