Immediately after combat damage has been assigned during the combat damage step, all combat damage is dealt simultaneously. See rule 510.2.
October 7, 2022 · Unfinity
Immediately after the active player has announced damage assignment orders (if necessary) during the declare blockers step, for each creature that’s blocking multiple creatures, the defending player announces the damage assignment order among the attacking creatures. See rule 509.3.
November 19, 2021 · Innistrad: Crimson Vow
Immediately after the combat damage step begins, each player in APNAP order announces how each attacking or blocking creature they control assigns its combat damage. See rule 510.1.
April 27, 2018 · Dominaria
Immediately after combat damage has been assigned during the combat damage step, all combat damage is dealt simultaneously. See rule 510.2.
February 1, 2014 · Born of the Gods
Immediately after the cleanup step begins, if the active player’s hand contains more cards than his or her maximum hand size (normally seven), he or she discards enough cards to reduce his or her hand size to that number. See rule 514.1.
September 30, 2011 · Innistrad
Immediately after the cleanup step begins, if the active player's hand contains more cards than his or her maximum hand size (normally seven), he or she discards enough cards to reduce his or her hand size to that number. See rule 514.1.
June 17, 2011 · Commander 2011
Immediately after the cleanup step begins, if the active player’s hand contains more cards
April 1, 2011 · Duel Decks: Knights vs. Dragons
Immediately after the cleanup step begins, if the active player's hand contains more cards than his or her maximum hand size (normally seven), he or she discards enough cards to reduce his or her hand size to that number. See rule 514.1.
February 4, 2011 · Mirrodin Besieged
Immediately after the cleanup step begins, if the active player’s hand contains more cards than his or her maximum hand size (normally seven), he or she discards enough cards to reduce his or her hand size to that number. See rule 514.1.
October 1, 2010 · Scars of Mirrodin
Immediately after the cleanup step begins, if the active player’s hand contains more cards
June 18, 2010 · Archenemy
Immediately after the cleanup step begins, if the active player's hand contains more cards than his or her maximum hand size (normally seven), he or she discards enough cards to reduce his or her hand size to that number. See rule 514.1.
February 1, 2010 · Worldwake
Immediately after the active player has discarded cards (if necessary) during the cleanup step, all damage is removed from permanents and all "until end of turn" and "this turn" effects end. These actions happen simultaneously. See rule 514.2.