How Magic Resistance Works in Pudge Hook Wars
Multiplicative Stacking Nature of Magic Resistance:
(Pudge has an initial Magic Resistance of 25%.)
Formula for damage:
damage taken = damage*(1-resist1)*(1-resist2)...*(1-resistn)
X% Magic Resistance means resist = X/100
where n = total number of effects granting magic resistance.
Let us assume that a 360 damage Meat Hook hits Pudge
Initially, Pudge will receive:
360*(1-0.25) = 270 damage
If he has an item which grants 15% Magic Resistance, the damage he will take is:
360*(1-0.25)*(1-0.15) = 229.5 damage
If he has 2 items which grants 15% Magic Resistance, the damage he will take is:
360*(1-0.25)*(1-0.15)*(1-0.15) = 195.075 damage
If he has an item which grants 15% Magic Resistance and 20% Magic Resistance, he will take
360*(1-0.25)*(1-0.15)*(1-0.20) = 183.6 damage
If he has an item which grants 20% Magic Resistance but has a debuff which gives -15% Magic Resistance, he will take
360*(1-0.25)*(1-0.20)*(1-(-0.15)) = 248.4 damage