Brilliant Spark

If a face-up "Gem-Knight" monster(s) you control is destroyed by your opponent's attack or card effect: Target 1 of those destroyed monsters; inflict damage to your opponent equal to half its original ATK. If this card is in your Graveyard: You can send 1 "Gem-Knight" card from your hand to the Graveyard; add this card to your hand. You can only activate 1 "Brilliant Spark" per turn.