Thank you Riot for this change in patch 6.18!
With the shorter elo decay immunity duration on master and challenger tier, this means LESS SMURFING at lower elos! Also, because these players have to play more games to maintain their ranking, this makes these tiers more competitive!
or the keystone, for example) would apply to both his W and the other physical-damage sources in his kit and would probably have a much higher DPS as a result. Being gridlocked out of being able to get any sort of %mpen, on top of the breadth of different items that grant MR, stunts the amount of damage his is able to do with it.