Playing IA campaign and the question of whether or not these two cards affect each other came up. Specifically, does the effect of FtC happen in time to allow Ferocity to activate?
My thought is no because...
Ga declares attack > Gi activates FtC
At that point the declare already happened.
For the cause
Exhaust this card when another friendly figure within 3 spaces declares an attack. That figure becomes Focused.
Ferocity
When you declare an attack while you are focused, add 1 red die to your attack pool instead of one green die. This attack also gains cleave 1 *.