You can only use the 1st and 2nd effect of this card’s name each once per turn.
(1) During the Main Phase (Quick Effect): You can Tribute this card; Special Summon 1 “Naturia” monster from your Deck. If your opponent controls a face-up monster(s) with the highest ATK on the field, you can Special Summon 2 instead.
(2) If your opponent Special Summons a monster(s) from the Extra Deck, or you Special Summon a “Naturia” monster(s) from the Extra Deck, while this card is in your GY: You can Special Summon this card.
Atom 1.0
