Attack and Defence Rates

So here is a little help about the attack and defence rate of a character card :

# attack : < ?/7 , range : Saphira is 5/7 and carnoc is 6/7, it's the rate that will be multiplied by the damages or the restored HP of an attack which total is the final cost of the attack ( only on attack mode )>
# defence :

Exemple :

I've the eragon card which attack rate is 5/7 and defence's one is 4/7.

1.

I've Eragon in Attack mode : I use the Quick Blow attack ( 100 dmg ).

( Attack Mode )

So the total damages that the attack will cost is 5x100 : 500 dmg.
That is only true when the card is in attack mode. If it's in defence mode, the cost of the attack is only the base damages ( in that exemple : 100 dmg )

2.

I've Eragon in Defence mode : I'm under an attack ( for exemple : Carnoc's Magic bolt : 6x150 : 900 dmg ( remember : 6 for 6/7 of attack and 150 for the attack's base damages )

( Attack Mode ) VS ( Defence Mode )

So has Eragon has a defence rate of 4/7 , he can hold 4x150 : 600 dmg ( 150 is carnoc's attack basic damages lvl ) so it will only cost Eragon 900 - 600 : 300 dmg !
That is only true when the card is in defence mode. If it's in attack mode, the HP of the attacked card will be reduce by the entire damages of the ennemy's attack. ( in that exemple eragon will see his HP fall by 900 )