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Magic: The Gathering Comprehensive Rules Changes

Masters Edition to Lorwyn (Single Change View)

General changes

Old rule (Masters Edition) New rule (Lorwyn)

Game Action

Several steps contain actions that don't use the stack. These actions are game actions. The game actions are phasing in and out at the start of the untap step (see rule 302.1), untapping at the start of the untap step (see rule 302.2), drawing a card at the start of the draw step (see rule 304.1), declaring attackers at the start of the declare attackers step (see rule 308.1), declaring blockers at the start of the declare blockers step (see rule 309.1), the active player discarding down to his or her maximum hand size at the start of the cleanup step (see rule 314), and removing damage from permanents and ending "until end of turn" effects at the start of the cleanup step (see rule 314). Mana burn at the end of a phase is also a game action (see rule 300.3).

Game Action

Several steps contain actions that don't use the stack. These actions are game actions. The game actions are phasing in and out at the start of the untap step (see rule 302.1), untapping at the start of the untap step (see rule 302.2), drawing a card at the start of the draw step (see rule 304.1), declaring attackers at the start of the declare attackers step (see rule 308.1), declaring blockers at the start of the declare blockers step (see rule 309.1), the active player discarding down to his or her maximum hand size at the start of the cleanup step (see rule 314.1), and removing damage from permanents and ending "until end of turn" effects during the cleanup step (see rule 314.2). Mana burn at the end of a phase is also a game action (see rule 300.3).