Creature â Eldrazi
Your opponents can't cast spells with even converted mana costs. (Zero is even.)
Your opponents can't block with creatures with even converted mana costs.
Yes, your opponent canâ€™t even. We know.
The converted mana cost of a face-down creature spell or a face-down creature is 0. Void Winnower will stop face-down creature spells from being cast and face-down creatures from blocking.
For spells with in their mana costs, use the value chosen for X to determine if the spellâ€™s converted mana cost is even or not. For example, your opponent could cast Endless One (with mana cost ) with X equal to 5, but not with X equal to 6.
For creatures on the battlefield with in their mana costs, the value for X is 0. Mistcutter Hydra (a creature with mana cost ) could block, but Endless One could not.
Effects that increase or reduce the cost to cast a spell donâ€™t affect that spellâ€™s converted mana cost.
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