河流巨蛇
生物～巨蛇
除非你的坟墓场中有五张或更多牌，否则河流巨蛇不能攻击。
循环（，弃掉此牌：抓一张牌。）
循环（，弃掉此牌：抓一张牌。）
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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