Historical Rules · 23 April 2010
Rule 704.5f
Official source text from the 23 April 2010 Rules release
If a creature has toughness 0 or less, it's put into its owner's graveyard. Regeneration can't replace this event.
Historical Rules · 23 April 2010
Official source text from the 23 April 2010 Rules release
If a creature has toughness 0 or less, it's put into its owner's graveyard. Regeneration can't replace this event.