OracletextSturdy Hatchling comes into play with four -1/-1 counters on it.
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(G/U): Sturdy Hatchling gains shroud until end of turn.
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Whenever you play a green spell, remove a -1/-1 counter from Sturdy Hatchling.
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Whenever you play a blue spell, remove a -1/-1 counter from Sturdy Hatchling.