Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Hexproof from black

Whenever Garruk's Harbinger deals combat damage to a player or planeswalker, look at that many cards from the top of your library. You may reveal a creature card or Garruk planeswalker card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Whenever another creature you control with power 3 or greater enters, you may draw a card.

Vigilance

When Garruk's Warsteed enters, you may search your library and/or graveyard for a card named Garruk, Savage Herald, reveal it, and put it into your hand. If you search your library this way, shuffle.