Just to update this thread, I've been driving the car pretty hard and last week this ticking noise WENT AWAY. I drove it to Florida and back, roughly 10 hours, and it's smooth and quiet again. I don't really get it. Maybe it was that 'stiction' the car shows talk about?
Edit- Update 6/5/19
Unrelated to the magnet...I think I found the source of the ticking noise. I replaced the intake manifold (P2015) and a large chunk of plastic was missing from between a couple ports. Something that goes over the flapper shaft. There was also considerable wear on the head where this piece was obviously moving around. I believe it was sucked into the head and bouncing around with the valves and eventually inside the cylinder. This would explain how one of my spark plugs got bent and closed up. My friend with the 09 had a similar spark plug issue and he also has a failing manifold, it's probably plastic that sucked into the cylinder.