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This search based on the March 17, 2008 release of the Rulings.
420 - State-Based Effects
- 420.1 - State-based effects are a special category that apply only to those
conditions listed below. Abilities that watch for a specified game state
are triggered abilities, not state-based effects. (See
Rule 404, "Triggered Abilities.") [CompRules 2003/10/01]
- 420.2 - State-based effects are always active and are not controlled by
any player. [CompRules 2005/08/01]
- 420.3 - Whenever a player would get priority (see Rule 408, "Timing of
Spells and Abilities"), the game checks for any of the listed conditions
for state-based effects. All applicable effects resolve as a single
event, then the check is repeated. Once no more state-based effects have
been generated, triggered abilities go on the stack, and then the
appropriate player gets priority. This check is also made during the
cleanup step (see Rule 314); if any of the listed conditions apply, the
active player receives priority. [CompRules 2003/07/01]
- 420.4 - Unlike triggered abilities, state-based effects pay no attention to
what happens during the resolution of a spell or ability.
Example: A player controls a creature with the ability "This creature's
power and toughness are each equal to the number of cards in your hand"
and plays a spell whose effect is "Discard your hand, then draw seven
cards." The creature will temporarily have toughness 0 in the middle of
the spell's resolution but will be back up to toughness 7 when the spell
finishes resolving. Thus the creature will survive when state-based
effects are checked. In contrast, an ability that triggers when the
player has no cards in hand goes on the stack after the spell resolves,
because its trigger event happened during resolution.
[CompRules 2003/07/01]
- 420.5 - The state-based effects are as follows: [CompRules 2003/07/01]
- 420.5a - A player with 0 or less life loses the game. [CompRules 2003/10/01]
- 420.5b - A creature with toughness 0 or less is put into its owner's
graveyard. Regeneration can't replace this event. [CompRules 2003/07/01]
- 420.5c - A creature with lethal damage, but greater than 0 toughness, is
destroyed. Lethal damage is an amount of damage greater than or equal to
a creature's toughness. Regeneration can replace this event.
[CompRules 2004/06/01]
- 420.5d - An Aura attached an illegal object or player, or not attached to
a object or player is put into its owner's graveyard.
[CompRules 2007/05/01]
- 420.5e - If two or more legendary permanents with the same name are in play,
all are put into their owners' graveyards. This is called the
"legend rule." If only one of those permanents is legendary, this rule
doesn't apply. [CompRules 2005/10/01]
- 420.5f - A token in a zone other than the in-play zone ceases to exist.
[CompRules 2003/07/01]
- 420.5g - A player who attempted to draw a card from an empty library since
the last time state-based effects were checked loses the game.
[CompRules 2006/10/01]
- 420.5h - A player with ten or more poison counters loses the game.
[CompRules 2003/07/01]
- 420.5i - If two or more permanents have the supertype world, all except the
one that has been a permanent with the world supertype in play for the
shortest amount of time are put into their owners' graveyards. In the
event of a tie for the shortest amount of time, all are put into their
owners' graveyards. This is called the "world rule."
[CompRules 2004/10/01]
- 420.5j - If a copy of a spell is in a zone other than the stack, it ceases
to exist. If a copy of a card is in any zone other than the stack or the
in-play zone, it ceases to exist. [CompRules 2008/02/01]
- 420.5k - An Equipment or Fortification attached to an illegal permanent
becomes unattached from that permanent. It remains in play.
[CompRules 2007/05/01]
- 420.5m - A permanent that's neither an Aura, an Equipment, nor a
Fortification but is attached to another permanent, becomes unattached
from that parmanent. It remains in play. [CompRules 2007/05/01]
- 420.5n - If a permanent has both a +1/+1 counter and a -1/-1 counter on it,
N +1/+1 and N -1/-1 counters are removed from it, where N is the smaller
of the number of +1/+1 and -1/-1 counters on it. [CompRules 2006/10/01]
- 420.5p - A planeswalker with loyalty 0 is put into its owner's graveyard.
[CompRules 2007/10/01]
- 420.5q - If two or more planeswalkers that share a planeswalker type are in
play, all are put into their owners' graveyards. [CompRules 2007/10/01]
- 420.5.Ruling.1 - Rule 420.5e used to have one of the legendary permanents
remaining in play, but as of 2004/10/01 all of them are removed.
[D'Angelo 2005/10/01]
This search based on the March 17, 2008 release of the Rulings.
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