Minions

I was playing an aram game the other day then I died to an ability that came sort of close to killing me then I died, when I looked at the death causes, it was a champ kill, but to the side was a castor minion that had this thing called Odin's shield ---, or something or other and it did 300+ base ap + 250+ more ap it had a symbol like yasuo's passive w/out yasuo in it and was gold in color bug? or some ability or idem that I don't know about? <kinda like that.