Majin Kuu, Witch's Underling (BT30-078) [Three Glorious Fighters]

Product Details

[Counter:Attack] [Limit 1] Negate the attack and play this card.
[Permanent] If your life is at 4 or less and you have a yellow "Demon Realm" card with an [Evolve] skill in play, you may activate this card's [Counter] skill from your hand without paying its energy cost.
[Auto] If it's your opponent's turn : When this card is played, during this turn, the next time you activate an [Evolve] skill on a "Majin Kuu : DA" card from your hand, reduce the skill cost by Y.