Limbo’s fourth ability is Cataclysm. He calls forth a dimensional nexus connecting the rift plane with the material plane. All who cross the threshold will in fact be stepping into the rift, where Limbo rules supreme. The initial radius of this pocket dimension is 16 metres around the designated cast location, which will begin to shrink down to a 5 metre radius before completely dissipating. All of this occurs within a 30-second timeframe.
Now be warned – the cataclysm affects the way the battle is waged, with different effects depending on whether you are friend or foe. Allies in the cataclysm can move freely and will generate 2 Energy every second, which cannot be interrupted. Enemies within the casting area will take 500 Blast Damage on the appearance and again at the disappearance of the pocket dimension, along with 300 Damage for entering and leaving the rift. Additional damage may be dealt by the collapse of cataclysm based on the average Health and Shields of enemies caught in the centre.
So, all things considered, here are some builds you may want to try on your Limbo: