Resources

Magic: The Gathering Comprehensive Rules Changes

Masters Edition to Lorwyn (Single Change View)

General changes

Old rule (Masters Edition) New rule (Lorwyn)

Toughness

The number after the slash printed on the lower right corner of a creature card is its toughness. See rule 208, "Power/Toughness." A creature that's been dealt damage greater than or equal to its toughness (and greater than 0) has lethal damage and will be destroyed the next time any player would receive priority. This is a state-based effect. Some creature cards have toughness represented by * instead of a number. The object has a characteristic-defining ability that sets its toughness according to some stated condition. This ability functions in all zones. A noncreature permanent has no toughness, even if it's a card with a toughness printed on it (such as a Licid that's become an Aura).

Toughness

Toughness is a characteristic that only creatures have. The number after the slash printed on the lower right corner of a creature card is its toughness. See rule 208, "Power/Toughness." A creature that's been dealt damage greater than or equal to its toughness (and greater than 0) has been dealt lethal damage and is destroyed. This is a state-based effect; see rule 420. Some creature cards have toughness represented by * instead of a number. The object has a characteristic-defining ability that sets its toughness according to some stated condition. This ability functions in all zones. A noncreature permanent has no toughness, even if it's a card with a toughness printed on it (such as a Licid that's become an Aura).