Sentry Oak 
Creature — Treefolk Warrior
$0.18 #29584 0.00 18.9 years
Defender
At the beginning of combat on your turn, you may clash with an opponent. If you win, this creature 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 their choice of the top or bottom. A player wins if their card had a greater mana value.)
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Cards similar to Sentry Oak expected a card that isn't here?
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