stripped engine block coolant plug

[987qqq]

I stripped the head on the engine block coolant drain plug on my 1994 Tercel. The threads were probably corroded because I really cranked on it and it wouldn't budge. How do I get it out? I've sprayed it with liquid wrench and tried to turn it many times but this didn't help. Should I just leave it alone because trying to remove it might break it? Thanks.