The Horseman Of War

Haste, trample
Other creatures you control have haste.
Whenever The Horseman Of War attacks, other attacking creatures get +2/+0 until end of turn.
Dash {2}{b}{r} (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.)