Gonfurian avatar + single target spells

hey guys just read the Gonfurian avatar description.

Avatar Trait: Eraser - Your Creatures’ single-target spells now affect all the creatures on the default selected side, but they deal 50% less damage, heal 50% less health, and increase/decrease stats 50% less. This trait only affets spells that are cast manually.

does the effect, effect ‘single target’ spell gems that have 'cast on extra target?

so for instance if i have molten armor, it will cause shell and 30% attack on all my creatures?

what if I have mutilate? will it mutilate the entire enemy team?

what If i have these spells to cast on provoke? does that count as ‘manually’ ?