Raxacoricofallapatorian (Four Doctors)

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A Raxacoricofallapatorian shoots the Doctor. (COMIC: Four Doctors)

In a timeline created by a continuity bomb where the Tenth Doctor embraced the title of "Time Lord Victorious" and became a mad tyrant who ruled over time and space, a Raxacoricofallapatorian shot him dead without regeneration. (COMIC: Four Doctors)