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For instance, with a Brain in a Jar with two counters, you could cast either half of Breaking // Entering or Beck // Call, since the converted mana costs of the card were two

The card has no attractive points for any other competitive formats, which makes this Elder Dragon a short-lived star

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It also has an effect that allows the player to attach any Ghostrick card from their hand to it as a material, but it's quite slow to accumulate 10 this way

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Alternatively, we can try and harness the decks considerable token generation ability to try and help cast them: either by convoking with Wand of the Worldsoul, or powering them out with an attack from Epistolary Librarian