Resources

Magic: The Gathering Comprehensive Rules Changes

Masters Edition to Lorwyn (Single Change View)

General changes

Old rule (Masters Edition) New rule (Lorwyn)

310.2b.

An unblocked attacking creature will assign all its combat damage to the defending player.

310.2b.

An unblocked attacking creature that's attacking a player will assign all its combat damage to the defending player. An unblocked attacking creature that's attacking a planeswalker will assign all its combat damage to the planeswalker it's attacking. If the creature isn't currently attacking anything (if, for example, it was attacking a planeswalker that has left play), it will assign no combat damage.