If a creature has toughness greater than 0, it has damage marked on it, and the total damage marked on it is greater than or equal to its toughness, that creature has been dealt lethal damage and is destroyed. Regeneration can replace this event.
September 30, 2011 · Innistrad
If a creature has toughness greater than 0, and the total damage marked on it is greater than or equal to its toughness, that creature has been dealt lethal damage and is destroyed. Regeneration can replace this event.
June 17, 2011 · Commander 2011
If a creature has toughness greater than 0, and the total damage marked on it is greater than
February 4, 2011 · Mirrodin Besieged
If a creature has toughness greater than 0, and the total damage marked on it is greater than or equal to its toughness, that creature has been dealt lethal damage and is destroyed. Regeneration can replace this event.
October 1, 2010 · Scars of Mirrodin
If a creature has toughness greater than 0, and the total damage marked on it is greater than
February 1, 2010 · Worldwake
If a creature has toughness greater than 0, and the total damage marked on it is greater than or equal to its toughness, that creature has been dealt lethal damage and is destroyed. Regeneration can replace this event.