I am not sure to understand the health perk for the middle mage tower, especially because I havent fight a guild in war with this perk.
For example, an enemy hero attacks my lineup in the mage tower and his health would normally be 100hp / 100 hp.
With this perk active ( the 20% one) when the fight starts for the first wave of minions, his health will be :
a) 80 hp / 100 hp
b) 80 hp / 80 hp
I hope my question is clear and thanks in advance for an answer