Playing League For the First Time vs When You Know How to Play

Upvoting before wave of upvotes and comments arrive

WTF is that thing in the second image and where is the Divine weapon used to slay it?

http://i.imgur.com/bofUVay.gif?noredirect

Is that a Bloodborne reference?

http://i3.kym-cdn.com/photos/images/original/001/057/622/56b.jpg

Wot in tarnation is that thing supposed to be?