Tuskan Day Rider

Haste, trample, vigilance, nightbound
Tuskan Day Rider's attack power is equal
to the number of red and white mana on the battlefield.Whenever a Human, or Knight
enter the battlefield under
your control, search your deck for a plains or
a moutain put it onto the battlefield tapped the shuffle.
Stampede .1(Whenever this creature deals combat damage
scry.1)