You can banish this card from your GY, then target 1 Reptile monster you control and 1 face-up monster your opponent controls, to activate 1 of these effects; • Change those monsters to face-down Defense Position. • Destroy that monster you control, and if you do, change the ATK of the other monster to 0 until the end of this turn. You can only use this effect of "Yamorimori" once per turn.