Trample over planeswalkers is a variant of trample that modifies the rules for assigning combat damage to planeswalkers. The controller of a creature with trample over planeswalkers assigns that creature’s combat damage as described in rule 702.19b, with one exception. If that creature is attacking a planeswalker, after lethal damage is assigned to all blocking creatures and damage at least equal to the loyalty of the planeswalker the creature is attacking is assigned to that planeswalker, further excess damage may be assigned as the attacking creature’s controller chooses among those blocking creatures, that planeswalker, and that planeswalker’s controller. When checking for assigned damage equal to a planeswalker’s loyalty, take into account damage from other creatures that’s being assigned during the same combat damage step, but not any abilities or effects that might change the amount of damage that’s actually dealt.
May 3, 2019 · War of the Spark
If an attacking creature with trample is blocked, but there are no creatures blocking it when damage is assigned, all its damage is assigned to the player or planeswalker it’s attacking.
January 25, 2019 · Ravnica Allegiance
If an attacking creature with trample is blocked, but there are no creatures blocking it when damage is assigned, all its damage is assigned to the player or planeswalker it's attacking.
February 1, 2014 · Born of the Gods
If an attacking creature with trample is blocked, but there are no creatures blocking it when damage is assigned, all its damage is assigned to the player or planeswalker it’s attacking.
July 13, 2013 · Magic 2014
If an attacking creature with trample is blocked, but there are no creatures blocking it when damage is assigned, all its damage is assigned to the player or planeswalker it's attacking.
June 17, 2011 · Commander 2011
Multiple instances of vigilance on the same creature are redundant.
April 1, 2011 · Duel Decks: Knights vs. Dragons
As a player declares attackers, he or she may declare that one or more attacking creatures with banding and up to one attacking creature without banding (even if it has "bands with other") are all in a "band." He or she may also declare that one or more attacking [quality] creatures with "bands with other [quality]" and any number of other attacking [quality] creatures are all in a band. A player may declare as many attacking bands as he or she wants, but each creature may be a member of only one of them. (Defending players can't declare bands but may use banding in a different way; see rule 702.19j.)
February 4, 2011 · Mirrodin Besieged
As a player declares attackers, he or she may declare that one or more attacking creatures with banding and up to one attacking creature without banding (even if it has “bands with other”) are all in a “band.” He or she may also declare that one or more attacking [quality] creatures with “bands with other [quality]” and any number of other attacking [quality] creatures are all in a band. A player may declare as many attacking bands as he or she wants, but each creature may be a member of only one of them. (Defending players can’t declare bands but may use banding in a different way; see rule 702.19j.)
October 1, 2010 · Scars of Mirrodin
As a player declares attackers, he or she may declare that one or more attacking creatures
February 1, 2010 · Worldwake
As a player declares attackers, he or she may declare that one or more attacking creatures with banding and up to one attacking creature without banding (even if it has "bands with other") are all in a "band." He or she may also declare that one or more attacking [quality] creatures with "bands with other [quality]" and any number of other attacking [quality] creatures are all in a band. A player may declare as many attacking bands as he or she wants, but each creature may be a member of only one of them. (Defending players can't declare bands but may use banding in a different way; see rule 702.19j.)