Opum's Technique is a fast spell card.
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Opum's Technique is part of the Techniques cycle of spells in Empire of Glass. Each of these spells has three choose one effects, two of which are related to one of the five unit types supported in the set: Sentinels, Grenadin, Mandrakes, Soldiers, and Valkyrie. The cards are: Opum's Technique, Tesseract's Technique, Kudzu's Technique, Argo's Technique and Dichro's Technique.