Each time a face-up Plant-Type monster(s) on the field is destroyed, place 1 Flower Counter on this card. You can remove any number of Flower Counters from this card to activate these effects.● 1 Counter: Target 1 Plant-Type monster on the field; that target gains 400 ATK and DEF until the end of this turn. (This ATK gain remains even if this card leaves the field.)● 2 Counters: Target 1 card on the field; destroy that target.● 3 Counters: Target 1 Plant-Type monster in your Graveyard; Special Summon that target.
Use Fragrance Storm to destroy a Plant-type monster on the field to draw a card and add a counter to The World Tree. Can be comboed with DNA Surgery, to allow you to destroy any face-up monster on the field.
Some plant monster's effects are activated when they are destroyed.
Botanical Girl allows you to search your deck for another Plant-type monster with 1000 or less defense.
Lord Poison revives any Plant-type monster in your graveyard, when he is destroyed by battle.
Naturia deck is full of Plant-type monsters which would benefit from The World Tree. Remove 1 counter to give your Naturia monster a much needed attack boost, remove 2 counters for card removal, or remove 3 counters to revive a Plant-type monster in your graveyard adding to the already excellent swarm potential of Naturia.