Mongol Horde

Trample, haste
When Mongol Horde enters the battlefield,
Creatures you control gain trample and hexproof.
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.)
Except for the Mongols.