Great Mothers' Leader Ability, Threads of Destiny reads as follows in pertinent part (it's really long):
If all allies are Nightsister at the start of battle, at the start of each encounter and end of each turn, if there are no enemies inflicted with Doomed, Great Mothers removes Ability Block from themselves, gains the granted ability Fate Weaving, and takes a bonus turn. During this bonus turn, Great Mothers can only use Fate Weaving. Great Mothers can't use Fate Weaving two times in a row...
If all allies are Nightsister at the start of battle, at the end of each turn, if there are no other allies with Blessed, Great Mothers removes Ability Block from themselves, gains the granted ability Gift of Shadows, and takes a bonus turn. During this bonus turn, Great Mothers can only use Gift of Shadows.
So at the start of each encounter and any time there are either no allies with Blessed or no Enemies with Doomed, GM should take a bonus turn during which they can only use the relevant ability.
However, it doesn't seem to be working when other characters have 100% TM at the start of the encounter. Instead, as seen in the video, GM will take a turn during which they can only use Fate Weaving, then another character will take a turn, and then GM will take a turn during which they can only use Gift of Shadows. Sometimes this works out (like in the video) but I had a lot of runs tonight that got scuffed because Nihilus took a turn before I could use Blessed.
I've also noticed instances of GM getting a bonus turn mid-encounter after the Doomed enemy dies but not being able to use Fate Weaving and instead having to use Energy Threads or Majik Storm (if it's off CD). Unfortunately, I couldn't catch it while I was manually playing and then, once I hit auto on my fourth run of the night it happened (of course). My assumption is that this happens if GM is already at 100% TM when the enemy with Doomed dies but I can't swear to that.
