河流巨蛇
生物～巨蛇
除非你的墳墓場中有五張或更多牌，否則河流巨蛇不能攻擊。
循環（，棄掉此牌：抽一張牌。）
循環（，棄掉此牌：抽一張牌。）
5/5
standard
future
historic
gladiator
pioneer
modern
legacy
pauper
vintage
penny
commander
brawl
alchemy
paupercommander
duel
oldschool
premodern
Rulings
Once River Serpent has attacked, it will remain in combat even if the number of cards in your graveyard becomes four or fewer.
Rulings
Once River Serpent has attacked, it will remain in combat even if the number of cards in your graveyard becomes four or fewer.
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