Sennet Thunderfall

When your opponent activates a Spell/Trap Card while you control a Normal Monster or "Sennet" Ritual Monster: Negate the activation, and if you do, destroy that card. If the total ATK of all Normal Monster Cards you control is more than 3000: You can banish this card from your GY; Set 1 "Sennet" Spell/Trap from your Deck or GY, except "Sennet Thunderfall". You can only use each effect of "Sennet Thunderfall" once per turn.