Unless this wording means "only applies to self", Ardent's getting buffed.
Ardent Censer Passive effect's Attack speed bonus changed from [20 - 35%] to [20 - 40%] Passive damage changed from [20 - 35] to [20 - 40] [New Effect] Passive effect now applies to yourself.
#I don't think its a buff.
I think its to encourage enchanters to be more interactive after its completion...but I wouldn't be surprised if I were wrong.
######RIP LoL
I want to clear something it only works if you shield your ally, so if I'm a Janna and I shield my Lucian we both get the buff but if I shield my self I don't get it. Confirmed https://www.reddit.com/r/leagueoflegends/comments/70wxlm/918_pbe_update/dn6jndu/?context=3

instead of
"support"
patch 7.19 and onward:
"support"
cuz he can heal it from w ( i think life still won't effect it ) and i think the making it that way so the support can defend them self batter
: HAHAHAHAHAHAHAHAHAHAHA