World Soul - Carbon — Ruling
Effetto 1
- The effect that adds an EARTH Fairy monster from your Deck to your hand is an Ignition Effect that can be activated on the field. (Tributing this card is the cost to activate this effect.)
Effetto 2
- The effect that places this card on the top of your Deck is a Trigger Effect that can be activated in the Graveyard. (It cannot be activated during the Damage Step.)
Fonte: YGOResources