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Kicker and/or (You may pay an additional and/or as you cast this spell.)
If Anavolver was kicked with its kicker, it enters the battlefield with two +1/+1 counters on it and with flying.
If Anavolver was kicked with its kicker, it enters the battlefield with a +1/+1 counter on it and with "Pay 3 life: Regenerate Anavolver."