Use Totem of Null in PvP Combat
Prepare Before Battle
Obtain your totem with /givet 1 and keep it in your inventory during fights. Tag your opponent(s) with /ttag <player> before combat begins, or tag them quickly if you get the chance during the fight.
Strategic Activation
The totem activates when you take fatal damage, so it works best as a last-resort defensive tool. If you're about to lose a fight, the totem will send your tagged opponents into the void even as you fall. This makes it a powerful equalizer in close matches.
Positioning Matters
Since tagged players are sent to the void regardless of location, they don't need to be near you when the totem activates. This means you can tag someone and activate the trap even if they've retreated or are fighting elsewhere.
Limitations
Remember that duplicated totems won't work in PvP. Only legitimately obtained totems function in combat. Plan your tagging carefully—once tagged, a player will fall into the void when your totem breaks, so make sure that's actually your target.