Wave-Motion Cannon [CP05-EN004] Super Rare Astral Pack 6 remove 1 counter from this

remove 1 counter from this card at the end of the Damage Step

If this card attacks your opponent directly and reduces their Life Points to 0

(This card was officially reprinted as an errata

if your other DARK Spellcaster monster battles an opponent's monster (Quick Effect): You can send this card from your hand or face-up from your field to the GY

Wave-Motion Cannon [CP05-EN004] Super Rare Astral Pack 6 remove 1 counter from thisSet: Champion Pack 5 Card type: Continuous Spell Rarity: Super Rare Attack: 0 Defense: 0 During your Main Phase, you can send this card to the Graveyard to inflict 1000 damage to your opponent for each of your Standby Phases that have passed since this card was activated.