Dracovenator

Dash {2}{w} (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.)
Dracovenator is estimated to have measured between 5.5 and 6.5 meters (18 and 21 ft) in length. Others estimates suggest that Dracovenator was 7 m (23 ft) long and weighed 400 kilograms (882 pounds).