Edge Imp Chain (BLCR-EN078) [Battles of Legend: Crystal Revenge]

When this card declares an attack: You can add 1 "Edge Imp Chain" from your Deck to your hand. If this card is sent from the hand or the field to the Graveyard: You can add 1 "Frightfur" card from your Deck to your hand. You can only use 1 "Edge Imp Chain" effect per turn, and only once that turn.