You can only use each effect of 'Light Dragonstar Rifun' once per turn. When this card you control is destroyed by your opponent's card (either by battle or by card effect) and sent to your Graveyard: You can Special Summon 1 'Dragonstar' monster from your Deck, except 'Light Dragonstar Rifun'. When a 'Dragonstar' monster you control is destroyed by battle or by a card effect and sent to the Graveyard, while this card is in the Graveyard: You can Special Summon this card from your Graveyard. If Summoned this way, banish this card when it leaves the field.