You cannot Pendulum Summon monsters, except "Blood Moon" monsters or DARK Dragon-Type Pendulum Monsters. This effect cannot be negated. If this card is activated: You can add 1 "Crimson Eclipse" Spell/Trap Card from your Deck to your hand OR 1 face-up "Blood Moon" monster from your Extra Deck to your hand, except "Thor, Thunderlord of the Blood Moon". Once, while this card is in your Pendulum Zone: You can target 1 "Blood Moon" or "Rift Beast" card in your other Pendulum Zone; Special Summon that target.
When this card is Special Summoned: You can target 1 "Blood Moon" monster in your Graveyard, except "Thor, Thunderlord of the Blood Moon"; Special Summon that target, but you cannot Special Summon any monsters for the rest of this turn, except "Blood Moon" or Dragon-Type monsters. You can Tribute this card; Special Summon 1 face-up "Rift Beast" Pendulum Monster from your Extra Deck or Graveyard. You can only use each effect of "Thor, Thunderlord of the Blood Moon" once per turn.