Diabolic Intent (Extended Art) [The Brothers' War] Number_153a (Whenever a creature enters the

(Whenever a creature enters the battlefield under your control with greater power or toughness than the number of +1/+1 counters on that token

Or just look up a calculator online

You can only use this effect of "Sage with Eyes of Blue" once per turn

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The Pokémon TCG: Celebrations Collection—Dark Sylveon V includes:

Diabolic Intent (Extended Art) [The Brothers' War] Number_153a (Whenever a creature enters theSet: The Brothers' War Type: Sorcery Rarity: Rare Cost: {1}{B} As an additional cost to cast this spell, sacrifice a creature. Search your library for a card, put that card into your hand, then shuffle.