Board Thread:The Panopticon/@comment-4028641-20151008023030/@comment-6032121-20191107213356

The word "Skaro" isn't even mentioned in The Eight Doctors; it's only said that the Master decides that "all he had to do now was get killed".

Yes, come to think of it. That works beautifully. Since Dicks tells us that he comes up with the "get myself killed so I can be reborn in the Doctor's body" scheme under the influence of the Cheetah madness, i's entirely possible for him to give up on this plan temporarily once he gets cured of the Cheetah Virus as per other offscreen sources. He'd then keep the Deathworm Morphant throughout his later existence as Ainley (and possibly the Tzun regeneration). He eventually end up as the half-decaying Tipple Master, either as the last incarnation of the cycle started by the Tzun, or through Morphant-aided body-hopping after Ainley is reverted to Beevers, depending on what account you're going with. That Master is then coincidentally ambushed by the Daleks in Egypt, and since he still has the Morphant, goes "what the hell, guess I'm going through with that scheme after all".