Sentry Oak [Lorwyn]

Description

Set:	Lorwyn
Type:	Creature — Treefolk Warrior
Rarity:	Uncommon
Cost:	{4}{W}

Defender
At the beginning of combat on your turn, you may clash with an opponent. If you win, Sentry Oak gets +2/+0 and loses defender until end of turn. (Each clashing player reveals the top card of their library, then puts that card on the top or bottom. A player wins if their card had a higher converted mana cost.)