Prized Villain

Do you have a prized villain that you might fudge dice rolls for in order to keep alive?

Mine is Sikarin Tsooth, a shape shifting spellcaster that gets into the head of the characters to bend and twist their sense of right and wrong. He has an addiction to manipulations until the heroes finish his long worked on plots for him, but think that they are defying him.

 

I won't fudge dice rolls for him buy my favorite villain has survived two different campaigns so far. Both have been long lasting campaigns (more than two years). He is a Lich named Malcon and he resides inside of an active volcano. He was imprisoned there and ultimately still uses it as a hideout. Two different high level parties (which rose from 1st level) faced him and defeated him. But both failed to destroy his phylactery. So he has not yet been destroyed.