New Tanking Items stat - Damage Reduction - few items thought up give demo

lately when i play a tank and buiild tanks in team fights feel its lack luster. what does "damage reduction" do how is it different to armor/mr

well frankly its stronger - it does what armor/mr does only better - and stacks with either. however that is why their is cap at 25% and 30% damage reduction

give demo of this is all current MR and Armor items will have this stat. some lower then others highiest is 5%

so lets say you have frozen heart 110 armor + 5% damage reduction

way it works is damage reduction then armor vs your damage