Barbarian Guides

Oracle Text

2R, T: Choose a land type. Target creature you control gains snow landwalk of the chosen type until end of turn. Return that creature to its owner's hand at the beginning of the next end step. (It can't be blocked as long as defending player controls a snow land of that type.)

Card Rulings

2/1/2014 You choose a land subtype, and if the defending player controls any snow lands with that subtype, the targeted creature can’t be blocked.