The owner of this deck hasn't added a sideboard, they probably should...
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Biogenic ooze seemed like a fun brew-around, and somebody online suggested duplicating it for powerful results.
Ramp into ooze. Protect ooze with counterspells. Duplicate ooze. Soon enough, your board grows enormously because of biogenic ooze buffing everything.
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NOTE: Set by owner when deck was made.