Your Predator rune has been exchanged to Electrocute

So I pick Kayn to test Predator on him in Practice tool and in the loading page I see electrocute. It can obviously be a visual bug but when the game loads I see "Your Predator rune has been exchanged to Electrocute" in the chat with white color. if anyone knows anything that makes this "not a bug" I would appreciate the help.

Here's the screenshot: https://www.photobox.co.uk/my/photo/full?photo_id=21868272936