Multiple instances of trample on the same creature are redundant. Multiple instances of trample over planeswalkers on the same creature are redundant.
June 17, 2011 · Commander 2011
rule 702.19g not present in this release
April 1, 2011 · Duel Decks: Knights vs. Dragons
Banding doesn't cause attacking creatures to share abilities, nor does it remove any abilities. The attacking creatures in a band are separate permanents.
February 4, 2011 · Mirrodin Besieged
Banding doesn’t cause attacking creatures to share abilities, nor does it remove any abilities. The attacking creatures in a band are separate permanents.
October 1, 2010 · Scars of Mirrodin
Banding doesn’t cause attacking creatures to share abilities, nor does it remove any
February 1, 2010 · Worldwake
Banding doesn't cause attacking creatures to share abilities, nor does it remove any abilities. The attacking creatures in a band are separate permanents.