Board Thread:Destiny Forum/@comment-25926749-20150730153357/@comment-26938201-20150908072127

To be honest, most people don't read the grimoire, so I would just go with option 2. You could always come up with a way around the grimoire. one idea could be that the Ahamkara went through Vex gates and became lost in time before learning how to navigate the gates and finding their way back. When they learnt that the majority of their species had been killed by the guardians, they decided to take revenge.