I went through my grimoire and notice I never got their cards. Also I don't know if Kagoor has a grimoire card or not I didn't see one.
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Edited by MtlRocker: 11/5/2015 5:17:28 PMHave to kill them in the Last Rites mission (where you sneak in the Crota's End level and steal part of Crota's soul). When you drop down, whip out a sniper and take shots at the sisters. Make sure you're completely invisible again before taking your next shot. Takes awhile, and make sure you have ammo synths. Edit: [url=https://youtu.be/bsUZpLoMZh0]Found a video for you [url]