Coven variant for Annis hag and Bheur hag from Volo's

[cfi2017]

https://docs.google.com/spreadsheets/d/1MAs_rQL4oKLXt46Oa_dU8IjJC05SnGikKRSa7xQfklE/edit#gid=0

[Asmor]

This seems like it should be good to go, but it's causing some problems when I try to add it. I'll have to investigate. Thank you for the submission.