Thirteenth Doctor's regeneration

Having been mortally wounded by the Qurunx's destruction beam after it was redirected towards her by the Spy Master, the Thirteenth Doctor underwent her regeneration into the Fourteenth Doctor whilst standing on a cliff just outside of the TARDIS. (TV: The Power of the Doctor)

Anticipation
After the Flux, Time hinted at the Master's Dalek Plan and warned the Doctor, "you won't outrun me. Your time is heading to its end. Nothing is forever. No regeneration, no life." (TV: The Vanquishers)

Aftermath
Immediately after the regeneration, the Fourteenth Doctor got involved in an adventure at the Dalek Dome. (COMIC: Liberation of the Daleks)