River Serpent
Creature — Serpent
This creature can't attack unless there are five or more cards in your graveyard.
Cycling (, Discard this card: Draw a card.)
Though the Luxa River brings life to Naktamun, it's not without dangers.
Christopher Moeller
Amonkhet (AKH)
• #66Rulings
Once River Serpent has attacked, it will remain in combat even if the number of cards in your graveyard becomes four or fewer.
(wotc • 2017-04-18)
Rulings
Once River Serpent has attacked, it will remain in combat even if the number of cards in your graveyard becomes four or fewer.
(wotc • 2017-04-18)