Resources

Magic: The Gathering Comprehensive Rules Changes

Core Set - Ninth Edition to Ravnica: City of Guilds (Single Change View)

General changes

Old rule (Core Set - Ninth Edition) New rule (Ravnica: City of Guilds)

Damage

Damage can be dealt to creatures and/or players. Damage dealt to a player is subtracted from his or her life total. Damage dealt to a creature stays on the permanent until end of turn, even if it stops being a creature. A creature with damage greater than or equal to its toughness has been dealt lethal damage and is destroyed. (See rule 420, "State-Based Effects.") Damage doesn't alter a creature's toughness. A noncreature permanent isn't affected by damage (but if it becomes a creature again before the damage is removed, the creature may be destroyed). During the cleanup step, all damage is removed from permanents. Costs and effects that read "lose life" or "pay life" don't deal damage, and that loss of life can't be prevented or otherwise altered by damage-prevention effects.

Damage

Damage can be dealt to creatures and/or players. Damage dealt to a player is subtracted from his or her life total. Damage dealt to a creature stays on the permanent until end of turn, even if it stops being a creature. A creature with damage greater than or equal to its toughness has been dealt lethal damage and is destroyed. (See rule 420, "State-Based Effects.") Damage doesn't alter a creature's toughness. A noncreature permanent isn't affected by damage (but if it becomes a creature again before the damage is removed, the creature may be destroyed). During the cleanup step, all damage is removed from permanents. Costs and effects that read "lose life" or "pay life" don't deal damage, and that loss of life can't be prevented or otherwise altered by effects that prevent or replace damage.