A hammer was a tool.

Dominic Montfalcon lost control of his pyrokinesis and burned himself to death. His wife Clarissa, who had the ability to reset time, caused the event to unhappen and saved his life. (PROSE: The Death of Art)

Donna Noble used a hammer to knock out a Sontaran by striking his probic vent. (TV: The Poison Sky)

Fenric possessed a medallion in the form of a hammer that could conjure up time storms. (AUDIO: Gods and Monsters)

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