OracletextShrewd Hatchling comes into play with four -1/-1 counters on it.
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(U/R): Target creature can't block Shrewd Hatchling this turn.
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Whenever you play a blue spell, remove a -1/-1 counter from Shrewd Hatchling.
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Whenever you play a red spell, remove a -1/-1 counter from Shrewd Hatchling.