Orphan Block was printed for Series 4, part of Cardsmiths Currency, a premium collector line tracing the history of money from ancient coinage to cryptocurrency. The variant tree for this card runs to 21 entries, with Onyx the hardest to find at 1 copies. Luke Daab illustrated it. Of the 99 cards in the set, this is number 10.
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In blockchain terminology, an orphan block (also called a stale block or an extinct block) is a block that is normally valid and verified but not accepted into the blockchain network due to the presence of another block with more proof of work.
