Once per turn: You can discard 1 card; discard 1 random card from your opponent's hand. You can Special Summon 1 Level 4 or lower Dragon-Type Pendulum Monster from your Deck, and if you do, destroy this card. You can only use this effect once while it is in the Pendulum Zone.
If this card is Normal or Special Summoned: You can target up to 2 "Blood Moon" cards you control; destroy those targets, then add a number of "Blood Moon" cards from your Deck to your hand equal to the number of cards destroyed by this effect. You can only use this effect of "Merlina, Sorceress of the Blood Moon" once per turn.