It's more like a set of ideas, but-
An event that draws in all ents (bots, physics vehicles, projectiles) to a certain area.
Or like a black hole gun that sucks up everything in front of it.
Or something that keeps projectiles from getting past a certain point by drawing them in.
Another thing-
Instead of it drawing players in, what about an expanding black hole that consumes everything?
If you touch the model, you simply die.
Would be an interesting gamemode, or a type of weapon, like the smart bomb from Super Smash Brothers Brawl.
Smart Bomb Grenade Launcher.
Negative radius impulses are buggy. Nevertheless, I would like so pull things into one spot, then create an explosion at the center.
THIS SO MUCH.
Also, another idea-
It's like the hookshot, but it pulls PLAYERS towards you!