Helped take down the dragon queen of the Dread of Vesicant.
The only two to survive of the dozen or more sent to end The Terror Tendrils of Acerak were Selthar ‘The Equilizing’ and Darius ‘The Black’ (as he was known then). His lair was looted, and the adventurers were made wealthy beyond imagination, though did not retire.
The massive amount of Monarch’s Crystal on Helca causes rebirth of Time Lords to be on it specifically, but has also served as a barrier to incursions from Time Lords as well. After the Blood of Saemon came, no Time Lords have visited Helca, and only Selthar ‘The Equilizing’ – the son of one – has been since.