You can use only 1 effect among the (1) and (2) effects with this card’s name per turn, and only once that turn.
(1) During the Main Phase, if you have a Reptile monster in your GY (Quick Effect): You can send this card from your hand to the GY, then target 1 face-up monster your opponent controls; change its ATK to 0.
(2) If your opponent controls a monster with 0 ATK: You can Special Summon this card from your GY.
Atom 1.0
