#RPGaDAY Day 29, Most memorable encounter
That would have to be the very first time I encountered a Lich back in the AD&D1 days. I am thinking it was the summer of 82 or so.
The DM read the monster description and she decided that because it was a former high-level magic-user that it had all these new spells. She played the monster as would have today, but back then that was kind of a new thing.
Needless to say it kicked our 6th to 7th level asses.
While I was annoyed, I later looked back on it and thought about how well she had done it all.