I and a few friends of mine have a project with castles and ages, one of whom thinks he will come to my castle without slipping and without dismantling or building over Ender pearls are forbidden and in the end we're not allowed to get chorus plants and through the closed He doesn't come to the main gate but he also says that he doesn't have to run through the labyrinth with traps to get in there, so I need a good defense
The classic when no TNT cannon is allowed is simply a fire-arrow firing system.
Maybe trap doors with lava underneath
Without slipping and without dismantling or building over ender pearls are forbidden and we're not allowed to get into the end to get chorus plants and he does not come through the locked main gate but he also means that he does not have to run through the labyrinth with traps to get in there
So with hacks? Traps won't do you any good. Or with / tp. There's no other way to get in there.
Otherwise use pistons to move blocks to expose lava or dispensers with arrows (damage and / or poisoning arrows). Or opposing mobs with surgical armor and name tags.
He has no op but one of my friends writes the plugin and he may have programmed an item with which he comes in, he likes to distribute such items