[Burst: After your opponent's Spirit/Ultimate declares an attack]
Summon this Spirit card. After that, activate 3 of your Spirit's ""Poison Blade"" effect.
[LV2][LV3] Poison Blade: 1 (When Battles) Put the top card of your opponent's deck under any opposing Spirit or Ultimate face down. If that Spirit or Ultimate leaves the Field, the cards under them is discarded.