Sentry Oak

four generic mana one white mana Creature — Treefolk WarriorPower and toughness3/5

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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0.18 $

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9 printings

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Sentry Oak rulings

2007-10-01
Specifically, this ability triggers when the beginning of combat step starts during your turn.

Sentry Oak keyword rules

Clash Rule 701.23

To clash, a player reveals the top card of their library. That player may then put that card on the bottom of their library.

“Clash with an opponent” means “Choose an opponent. You and that opponent each clash.”

Each clashing player reveals the top card of their library at the same time. Then those players decide in APNAP order (see rule ) where to put those cards, then those cards move at the same time.

A player wins a clash if that player revealed a card with a higher mana value than all other cards revealed in that clash.