Ultimate Experiment Ddraig

Lore
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Acquisition
Added on March 17, 2015 as a final reward during Unspoken Evil Odyssey Event, altogether 7,700+ cards:
 * Final rank 401-1,500 (x2), 1,501-2,000, 2,000-4,000 (x2), 4,001-5,000.
 * Guild rank 21-50.

Name origin
Ddraig, draig or nraig are a Welsh words for "dragon".