This video confirmed what I was thinking.
You need three things:
Flat tip screwdriver
Channel locks pliers (or ViceGrips)
Take your screwdriver and hammer. Place the screwdriver flat along the bottom of the freeze plug. Hit the screwdriver with the hammer until the freeze plug "eye lids" (as the guy called it ... this is where the freeze plug ...
Sometimes really corroded ones will not remove like that or there is a lip behind the core plug that doesn't allow that to happen.
Sometimes you can drill a hole in it and screw in a bolt with a self tapping thread, eventually the bolt will come up against the inside of the block and the plug will pull out.
Or you can drill a hole in it and insert a self ...
Proper tool is a freeze plug puller.
You drill a small hole that the screw tip of the puller grabs and it then pulls the plug out.
While most common home mechanic use is the screw driver (bad tool for the job as you should not strike a screwdriver with a hammer).
If you must, use a drift or small chisel with the hammer. Just make your hits carefully ...