
Eventually the devs caved and massively buffed monster density across the board. Back before Reaper of Souls people were complaining that there's is not enough monster density. This is undoubtedly the root cause of this entire lag problem. But then you click "Revive on Corpse" button and continue playing anyway. You slam your table and shout out in frustration: This game is unplayable!".

You teleport 5 meters to the left and, last but not least, the "You Have Died" message appears. For a while nothing at all happens and then suddenly BOOM - with a bright explosion of light multiple attacks and all the skills you tried to use but couldn't come out in an instant. Resigned to your fate, you continue holding down your attack button and await your judgement. With bated breath you move your mouse cursor to hover over it: "3762 ms". You see your latency indicator in bottom right corner turn red. At this point you notice that the enemies suffer from similar condition: they move a bit and try to attack you but nothing happens. You change tactics and try to move away, but as soon as you take a couple of steps in any direction you are forcibly teleported right back where you started. You try it couple more times - to the same effect. Your character obeys your order and swings their weapon but no light or fire is coming out. With all the buffs active and enemies grouped up, you finally use your main damage skill.

A devious smile crosses your lips as you prepare to unleash your devastating powers on those who dare stand against you. In fact, you have them right where you want them.

And yet, not even a shadow of fear lingers in your mind. The enemies outnumber you one hundred to one, they surround you on all sides and you can see bloodlust in their eyes.

You are fighting innumerable denizens of Hell (or sometimes innocent wild critters) in a hallucinatory nightmare created by ancient Nephalem spirits, commonly known as a Greater Rift.
