John Trumbull's "Painting of George Washington"

Origin
John Trumbull (1756 - 1843) was an American artist during the period of the American Revolutionary War, notable for his historical paintings. As a solider in the American Revolutionary War he was appointed second personal aide to General George Washington. Witnessing the Battle of Bunker Hill he sketched the British strongholds including weaknesses he saw turning them over to Washington who would remember the young man later in life. After the war he left American for study in London, upon his return he was requested by then President George Washington to commission a portrait of himself. A mixture of the intensity of Trumbull and the background of the man he painted the painting became an artifact. Before giving the finished work to Washington a burglar broke in Trumbull's house but was scared off by someone sounding a trumpet for alarm. Although wishing to thank the neighbor who blew the trumpet no one came forward.

Effects
Acts like an alarm if it senses impending battle. The Washington in the painting comes to life and plays a trumpet to raise the alarm.