Unstable Evolution [5DS2-EN030] Common BW89 When a Thunder monster's effect

When a Thunder monster's effect is activated in the hand

Set: HeartGold & SoulSilver: Black Star Promos Type: Psychic Rarity: Black Star Promo Retreat cost: Colorless

Set: EX: Holon Phantoms Type: Lightning Rarity: Ultra Rare Retreat cost: Colorless

Set: Professor Program Promos Type: Fire Rarity: Promo

Set: EX: FireRed & LeafGreen Type: Fighting Rarity: Holo Rare Retreat cost: Colorless

Unstable Evolution [5DS2-EN030] Common BW89 When a Thunder monster's effectSet: 5D's Starter Deck 2009 Card type: Equip Spell Card Rarity: Common While your Life Points are lower than your opponent's, the equipped monster's original ATK becomes 2400. While your Life Points are higher than your opponent's, its original ATK becomes 1000.