When this card is destroyed by battle and sent to the Graveyard, Special Summon 1 Level 1 Fiend-Type monster from your Deck.
How to Get
Special summons a monster from the deck.
Must be destroyed by battle to use effect.
Level 1 Fiends
Here are the monsters you can special summon with Stygian Security's effect. Special summon Dark Mimic LV1 so that you can special summon Dark Mimic LV3 during your next Standby Phase. Special summon Djinn Disserere of Rituals to use as Ritual Tribute even when he is in your graveyard. Usually you would want to summon another copy of Stygian Security either to stall and thin your deck, or to use as Synchro material.