The Deadly Assassin killed the Master.
Im in the minority in that I think The Deadly Assassin (TDA) is bad. Most of it is the Dr running around nightmere land with some surealist elements. The Time Lords are all made into idiots. George Pravda can't act. Is it meant to be a surpise that Goth is the baddie? Cause that disgise is paper thin.
But other than the rule of 12 the biggest impact it had was with the Master. It killed him. The Delgado Master and all subsequent versions are not the same character. And every single master episode after this is based off Peter Pratt. Same way that Davros's character would be based off the destiny version not the genisis version. But not to the same extent.
What can I say the Master has gone from being a gentelman baddie like Morriarty or Dr No to being Dick Dastardly.
"You dr so insufferably (snarling noise) good, so insufferably (snarlying noise) compassionate"
"Hate (chuckles gleefully) hate is strength"
"This accursed planet"
Thats how good villians with depth talk like right? Like remember in Shawshank Redemption when the warden spits when he says the word "charity"? Like Cobra Commando.
Please please explian to me why Anthney Ainley is "crap" but Peter Pratt is "good"? They are both written and act like the baddie in a Crash Babdicoot game. I know why, its cause Pratt was pre 1978 so therefore can do know wrong. While Ainley was JNT so is instagarbage.
Ok not every fan thinks that, but certinly the 60s and 70s get away with stuff that if the 80s 2000s 10s and 20s did would be toren to shreads for. Like revenge of the cybermen gets more leeway cause 70s, when its clearly worse than Sliver Nemisis or Nightmere in Sliver. But Ill save that rant for another time.
The master is meant to be a dark version of the dr right? So that works with Delgado. In what way is Ainely like Davison C Baker or McCoy? How is Roberts like McGann. Ill give you Simm is like Tennant but Gomez is nothing like Capaldi (baring the Romantic surnames) and Dawan is nothing like Whiterker.
Look Delgado wasnt the deepest villian, but he was threating charming menacing even funny at times. The other Masters are just cardboard, directionless. In fact ironically TDA dose give the master a goal of wanting to survive past his natural life, a common motovation for DW villians. But after Logopolis the Master's goal is...? No one seems to know.
I challenge you imagine Delgado in any other the other Master episodes. One of the few were i can see it is the five doctors. Where he is written by a Pertwee era writer. Ie someone who gets the character is more than just "bhwahahahaha blow up the orphange, kick that old lady to death bwahahahaha". Hes just so Flanderised.
At least the Rani comes with themes of animal testing or could be a Josef Mengele or Madem La Laurie figure. Ie themes substance. The post Pertwee master has none of that.