Rules glossary
118.7 What a player actually needs to do to pay a cost may be changed or reduced by effects. If the mana component of a cost is reduced to nothing by cost reduction effects, it’s considered to be {0}. Paying a cost changed or reduced by an effect counts as paying the original cost.
- 118.7a Effects that reduce a cost by an amount of generic mana affect only the generic mana component of that cost. They can’t affect the colored or colorless mana components of that cost.
- 118.7b If a cost is reduced by an amount of colored or colorless mana, but the cost doesn’t require mana of that type, the cost is reduced by that amount of generic mana.
- 118.7c If a cost is reduced by an amount of colored mana that exceeds its mana component of that color, the cost’s mana component of that color is reduced to nothing and the cost’s generic mana component is reduced by the difference.
- 118.7d If a cost is reduced by an amount of colorless mana that exceeds its colorless mana component, the cost’s colorless mana component is reduced to nothing and the cost’s generic mana component is reduced by the difference.
- 118.7e If a cost is reduced by an amount of mana represented by a hybrid mana symbol, the player paying that cost chooses one half of that symbol at the time the cost reduction is applied (see rule 601.2f). If a colored or colorless half is chosen, the cost is reduced by one mana of that type. If a generic half is chosen, the cost is reduced by an amount of generic mana equal to that half’s number. (refs: 601.2f)
- 118.7f If a cost is reduced by an amount of mana represented by a Phyrexian mana symbol, the cost is reduced by one mana of that symbol’s color.
- 118.7g If a cost is reduced by an amount of mana represented by one or more snow mana symbols, the cost is reduced by that much generic mana.