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Magic: The Gathering Comprehensive Rules Changes

Shadowmoor to Eventide (Single Change View)

General changes

Old rule (Shadowmoor) New rule (Eventide)

413.2c.

If an effect offers any choices other than choices already made as part of playing the spell or ability, the player announces these while applying the effect. The player can't choose an option that's illegal or impossible. (For example, if a player can't meet all the immediate requirements of an optional action, then he or she can't take that action, regardless of the consequences for not doing it.) Note that as an exception, having an empty library doesn't make drawing a card an impossible action. See rule 423.3.

Example: A spell's instruction reads, "You may sacrifice a creature. If you don't, you lose 4 life." A player who controls no creatures can't choose the sacrifice option.

413.2c.

If an effect offers any choices other than choices already made as part of playing the spell or ability, the player announces these while applying the effect. The player can't choose an option that's illegal or impossible, with the exception that having an empty library doesn't make drawing a card an impossible action (see rule 423.3).

Example: A spell's instruction reads, "You may sacrifice a creature. If you don't, you lose 4 life." A player who controls no creatures can't choose the sacrifice option.