Spirit Poacher (DUAD-EN080) - Duelist's Advance 1st Edition

Once per turn, during your opponent's Standby Phase: You can activate 1 of these effects;
• Place 1 monster from your Deck in your Spell & Trap Zone as a face-up Continuous Spell.
• Your opponent can Special Summon 1 Monster Card with less original ATK than their LP from your Spell & Trap Zone to their field, then they pay LP equal to its original ATK.
If an Effect Monster(s) you own is Special Summoned to your opponent's field: You can send this face-up card from the Spell & Trap Zone to the GY; Special Summon 1 Level 4 or lower monster from your Deck.