Yamorimori

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 them to face-down Defense Position.
● Destroy that monster you control, and if you do, make the ATK of that monster your opponent controls become 0 for the rest of the turn.
You can only use this effect of "Yamoimori" once per turn.