Happy Childhood

The Doctor and his best friend the Master during their totally happy childhood on Gallopfrey.
I would say its part of my headcanon but I'm not even gonna pretend I think this is canon to anything Its just part of Clevers fanfictional universe.

In that universe the Master got his cutie mark before the Doctor (one that's NOT related to time, shock horror). The Doctor got his when he looked into the time vortex (just like his daughter Dinky).
Before you say this Master looks nothing like the design I showed you earlier; keep in mind he was in his 13. incarnation the first time he appeared on the show This is his first incarnation, loosely based on the very short scenes of the kid Master seen in The Sound of Drums.

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