Abyss offers its users a wide range of pvp hacks, they all seem to be quite customizable and equally as powerful when configured correctly. A lot of these modules are made with 2b2t.org in mind, but they work just as well on other pvp servers.
Hacks that Abyss is known for:
Abyss is known for both its pvp and utility modules. Personally I think the rendering modules are also a stand out feature.
 Auto Crystal – This module easily has the most settings out of any client I have used, with a good config and low ping this module is quite powerful.
 Kill Aura – I was personally surprised at the power of the kill aura module, unlike other clients it is easy to configure and works well.
 Burrow – This module has a few settings and according to their promotion video it supposedly works on 2b2t.org
 Surround – This module struggles with higher ping, but overall it has a few settings and works as intended.
 offhand – There were a lot more settings than I was expecting, with a good config this module performed as expected.
 Hole filler – with higher ping this module causes rubber banding, but overall it works and has quite a few different settings.
 Auto Trap – I like the different modes offered by this module. In my testing it was reliable and worked well.