2006 Sequoia 154,000 miles. On the way home from work Friday my wife described the start of a tapping noise in the engine and check engine light came on. I had her look for fluids leaking and check the oil. It was a quart low which is odd as I never have to add oil between oil changes every 7500 miles. She also said traction control light was on. She was almost home and I was still at work. She said it ran fine and didn’t notice anything but the tapping noise that would increase with rpm’s. I told her to baby it home. Scanner said misfire in cylinder 5 p0305. I added a little oil and started it in the garage. Heard the tapping noise initially and then it went away. Noticed a lot of blue smoke at back of garage after letting it run maybe 20 seconds. Today I pulled the coil and spark plug and obviously have a major problem. I didn’t pull valve cover yet but any ideas what may have happened? The spark plug was loose and you can see the threads are tore up on it. Did the piston slam into the plug? (See photo)