Let me explain…
When blizz introduced the sling ring, they made the mistake to make the portal skill an oskill.
Oskills get boosted by +all skills.
But what is a portal… at a higher lvl? Keep this question in mind, I’ll answer it later.
Normal portals have a 2 yard radius, and they have a collision.
You probably know already, but you can, for example, tp between 2 pillars in the arreat summit to block the ancients and create a “pseudo moat trick” where they can’t hit you. The portal is gone when you hit the altar, but the collision is still there, creating a void where mobs can’t go.
Now… the problem with how they coded it, as an oskill that can be above lvl 1, is that each lvl is doubling the portal’s radius.
When you cast a new one, the previous one disappears, so it doesn’t do much by itself.
Except… when you pair it with another known bug.
We all know that barbs, at 200fcr, have a bugged cast rate. Unlike any other class. That’s because their action flag (AF), the frame at which the cast is performed, is only 1 frame before the end of the total animation length. The sorc has the same cast speed, but her AF is not as close to the end. 1 frame only is causing the server to not have time to react before next cast. This is why you often see the barbs at 200fcr either performing double casts, or no casts at all.
But what happens when you double cast the oskill portal?
The game server does not compute that your previous portal is gone. It stays there. And with enough +skills, that void I described earlier is big, and it stacks with the radius of each additional portals that you glitch on top.
And what happens when the collision is too big to fit in the curremt area?
Mobs have no room to exist.
They vanish instantly, leaving only their drops, which are also clearly bugged. Like this technique is literally breaking the game, cuz instead of normal drops, well, we see those absurd amounts drops picked from high TCs, bugged into uniques and hrs and just high quantity of all the good stuff that would require years of botting to obtain.
It’s ridiculous… I mean, it broke the economy beyond repair.
I’m done with this game. Playing it legit is now useless.
Fuck the portal barb seriously…
RIP all other builds.
Complementary info to understand the above...
Here's the full table showing AF for the barb
see how 200fcr is resulting in AF on frame 6, while the animation ends at frame 7.
Only 1 frame is not enough to allow the server to always compute it in time.
And here's an example showing this 'void' created by portals
This post was edited by SinsOfTheSun on Mar 11 2026 12:18pm