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There have been many variations of this card in the past, from valuable ghost rares to alternate arts

The combo with Darkrai is pretty obvious, so I wont go into it but I think that having an item that always grants confusion is always very positive

Theyre mana intensive to cast, and thats sort of their identity

Each time you cast your first spell during an opponents turn, you can exile the top card of that opponents library, exile it, and play it for as long as it remains exiled

Vingolfs Blessing Continuous Spell Card When this card is activated: You can send 1 LIGHT Fairy monster from your Deck to the GY

When played properly, you can absolutely bury your opponent with the value you generate through Thran