http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/1647198895/208257366?tab=overview
Only if you have gotten tanky enough with a tank item like Sunfire & plenty of cs, you should totally grab a 
on Sion. They killed you horribly, watch as how you kill them back slowly and mercilessly. :)
Imminent421 votesFeels like a bit of a waste to build an item solely for use during your passive.
Not like to stops them from CCing you either.
BeatzBoyFTW1 votesAs they always do, most of the time they would focus me down first in teamfights since I'm the tank, before they would go and engage on my ADC & other carries. By that time it is either:
They have the time to still CC me while taking free damage from my team
Just focus the ADC without having a care of my %HP damage plus slows.