Catacombs of Carthus is the best place to ruin someone's day.
Dark Souls 3: more trolling fun at the Catacombs of Carthus bridge
Dark Souls 3 invaders are a funny lot. Now that from Software has opened the door to gank squads - that is, groups of players deliberately bringing in invaders to farm them for covenant items - many invaders are letting go of the codes of honour that otherwise govern PvP duelling.
As a result, we get situations like those shown in JasonSic's video above, where invaders use the environment to their advantage in dealing with phantoms. Cheap? Maybe - but so is ganging up two or even three to one, right?
If you feel a pang in your heart for the players who fall for the ladder trick, note that they could just as easily run off the the next boss arena to lose their foe. They've chosen to try and take the invader down instead - probably for their own profit.
Outside of fight clubs, I'm a big fan of invaders being as tricky and deadly as they can be. The sound effect that heralds an invasion should send a shiver up your spine - even if your reaction is to bring in two or three phantoms to help chase your enemy off. I guess it's annoying to have your run interrupted by an invasion if for some reason you really want to play online before you reach the boss gate, maybe for co-op with a buddy or just because you're in a tough spot.
But still. Did you see yesterday's video of invasion tricks with the Ring of Obscuring? Catacombs of Carthus is super popular spot for invasions. You have been warned.