The World Tree (Purple) [DL18-EN012] Rare Ancient Bird While either of those cards

While either of those cards remain Set on the field

Set: Sun & Moon: Ultra Prism Type: Metal Rarity: Holo Rare Retreat cost: Colorless

when that monster is removed from the field

Set: HeartGold & SoulSilver: Triumphant Type: Grass Rarity: Ultra Rare Retreat cost: 0

The World Tree (Purple) [DL18-EN012] Rare Ancient Bird While either of those cardsSet: Duelist League Promo Card type: Continuous Spell Rarity: Rare Attack: 0 Defense: 0 Each time a face up Plant Type monster(s) on the field is destroyed, place 1 Flower Counter on this card. You can remove Flower Counters to activate this card''s effects: 1 Counter: Target face up Plant Type monster on the field, that target gains 400 ATK and DEF until the end of its turn.(This ATK gain remains even if this card leaves the field.) 2 Counters: