Brian Trosko <btrosko.TakeThisOut@panix.com> sent:
> David DeLaney <dbd.TakeThisOut@gatekeeper.vic.com> wrote:
> > Triggered ones, yes; they get removed just before the time to check what
> > triggered off stuff coming into play. Continuous abilities, generally yes,
> > but you have to look at layers, timestamp, and dependency to see what gets
> > affected (anything in layer 6 gets affected, timestamp/dependency in layer
> > 5, and stuff from layer 4 or below has already been applied). And "comes into
> > play with / as this comes into play", no. [I honestly forget what the answer
> > is for "comes into play tapped", but think it ended up being 'no'.]
> Hi. Poking me head in for the first time in years. Last time I followed
> the game, 6E was new and questions typically involved the stack.
> What's this "layer" stuff?
Continuous effects sometimes depend on one another and it's not always
obvious which order to evaluate their effects. Should I apply
Celestial Dawn first, which makes my creatures white, or should I apply
Crusade first, which gives the white creatures +1/+1? What about
counters, power-and-toughness setting effects, type-changing effects?
There are a lot of different effects that stick around affecting the
game (some of them end at the end of the turn though), and we want them
to work as intuitively as possible. That's what the layers are for.
They define exactly how to handle interacting continous effects. The
relevant rule defining the layers is 418.5a:
418.5a The values of an object's characteristics are determined by
starting with the actual object, then applying continuous effects in
a series of layers in the following order:
(1) copy effects (see rule 503, "Copying Objects");
(2) control-changing effects;
(3) text-changing effects;
(4) type-changing effects (which includes effects that change an
object's card type, subtype, and/or supertype);
(5) all other continuous effects, except those that change power
and/or toughness; and
(6) power- and/or toughness-changing effects.
Inside each layer from 1 through 5, apply effects from
characteristic-defining abilities first, then all other effects in
timestamp order. Inside layer 6, apply effects in a series of
sublayers in the following order:
(6a) effects from characteristic-defining abilities;
(6b) all other effects not specifically applied in 6c, 6d, or 6e;
(6c) changes from counters;
(6d) effects from static abilities that modify power and/or toughness
but don't set power and/or toughness to a specific number or value; and
(6e) effects that switch a creature's power and toughness.
Within each sublayer, apply effects in timestamp order. Note that
dependency may alter the order in which effects are applied within a
layer or sublayer. See also the rules for timestamp order and
dependency (rules 418.5b-418.5g).
Example: Crusade is an enchantment that reads "White creatures get
+1/+1." Crusade and a 2/2 black creature are in play. If an effect
then turns the creature white (layer 5), it gets +1/+1 from Crusade
(layer 6d), becoming 3/3. If the creature's color is later changed to
red (layer 5), Crusade's effect stops applying to it, and it will
return to being a 2/2.
Example: Gray Ogre, a 2/2 creature, is in play. An effect puts a
+1/+1 counter on it (layer 6c), making it 3/3. An effect that says
"Target creature gets +4/+4 until end of turn" is applied to it
(layer 6b), making it 7/7. An enchantment that says "Creatures you
control get +0/+2" enters play (layer 6d), making it a 7/9. An effect
that says "Target creature becomes 0/1 until end of turn" is applied
to it (layer 6b), making it a 1/4 (0/1, plus +1/+1 from the counter,
plus +0/+2 from the enchantment).
If you've been away from the game for a while and are just picking
it up again, you may find the summary of rules changes in the FAQ
useful. It lists the major changes that have happened - just start
reading where you left off. I'll be updating some time nearer to
the end of the year to explain planeswalkers.
--
-- Zoe Stephenson, NetRep rec.games.trading-cards.magic.rules
Group FAQ:
http://www.daeghnao.com/magic/faq/ --
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