[2020] Grim Fate node in Dread Shade not giving more damage multiplier with All For One

Thanks for the detailed report!

I believe this is actually working as intended. Grim Fate applies to all minions within the aura of Dread Shade, not just the minion you targeted. And, the targeted minion receives buffs via this aura unless the effect only applies to the targeted minion. As such, it is removed due to All For One disabling all aura buffs.

I can see how the interaction can be unintuitive, but it is consistent throughout. If you’d like to make a suggestion post about it you’re more than welcome to.