User blog comment:Takingday/Sion possible ability changes/@comment-1671452-20130802064257

Here's a better wording I would propose (removing the whole Relentless Point thing, but retaining the same effect:

Sion recieves 5/10/15/20/25 (+1% of bonus HP) less physical damage and 1/2/3/4/5 (+0.2% of bonus HP) less magical damage from attacks. This is calculated before Armor, Magic Resistance and Percentage Damage Reduction.