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Once you get some Cascade online, the card Selective Memory could be used to thin your deck of the nonland cards you don't need, so your Cascades are always hitting big stuff (or whatever you need in that game at that moment.) A huge gas piece you are missing here is Scroll Rack

Is It Worth It to Buy Dracula Cards

Note that her second ability with discard mechanic can also fuel your graveyard for an even more efficient use of her last ability

Is Blasting Station part of any infinite combos

Until the end of your next turn, you may play those cards.

This is because proxy cards can break the game's rules and go against fair use