Roble centinela

Criatura — Guerrero pueblo-arbóreo 3/5, 4W (5)
Defensor.
Al inicio del combate en tu turno, puedes enfrentarte con un oponente. Si ganas, el Roble centinela obtiene +2/+0 y pierde la habilidad de defensor hasta el final del turno. (Cada jugador enfrentado muestra la primera carta de su biblioteca, luego pone esa carta en la parte superior o inferior. Gana el jugador cuya carta tenga el mayor coste de maná convertido.)
Illus. Warren Mahy

Creature - Treefolk Warrior
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 his or her library, then puts that card on the top or bottom. A player wins if his or her card had a higher converted mana cost.)¹

Crystal Keep Rulings Summaries

• Note - Also see Clash, Rule 501.10.
• Note - Also see Defender, Rule 502.41.

Format Legality	Legal in Vintage, Legacy, Extended, Standard
Printings (1/9)	Lorwyn (Uncommon)