10.4.2. To "pay a cost" means to perform any actions
indicated by that cost.
10.4.2.1. If a cost includes multiple actions, they
should be performed in the listed order.
10.4.2.2. If the player is unable to pay the full cost,
they cannot and do not pay that cost at all.
10.4.3. If a cost specifies a zone, card, or other
player-specific game element (such as play
points) without specifying which player, that
player is assumed to be the controller of the card
or ability that requires the cost.
10.4.4. When a cost includes a play-point icon (5.2),
it means "if you have at least [number] remaining
play points, subtract [number] from them."
10.4.5. When a cost includes reducing a certain
value by a specified amount, that value must be
equal to or greater than the specified amount.
10.4.6. When a cost includes the icon without
specifying a card, it means "if this card is on the
field reserved, engage it." If a card is specified, it
means to engage that reserved card on the field.
10.4.6.1. This cost can be paid on the same turn
the card with the cost is put onto the field.
10.4.7. Abilities other than activated abilities may
also have a cost. As a general rule, card text
written in the form "[cost]: [effect]" denotes an
optional cost that can be paid when playing or
resolving the ability, and the resulting effect if
that cost is paid.
10.4.7.1. Some abilities are written in a similar
form: "[keyword]: [effect]." With the exception
of Earth Rite, these keywords do not
themselves constitute a cost. They may,
however, be accompanied by a cost, in which
case they are written in the form "[keyword],
[cost]: [effect]."
10.4.7.2. The effects applied as a result of paying
the cost include everything up to the end of the
paragraph or the end of the option in a
"choose" ability (5.17.1.1).
10.4.7.3. Card text written in the form "when
playing [card/ability], [process]: [effect]" means
the player has the option (10.6.2.2) to apply
the indicated effect by executing the indicated
process when playing that card or ability.
10.4.7.4. When an automatic ability is written in the
form "when(ever) [event], [process]: [effect]" or
"at the start of [event], [process]: [effect]," the
ability's controller has the option to apply the
indicated effect by executing the indicated
process when resolving the automatic ability.
10.4.7.5. If card text not covered above is written in
the form "[process]: [effect]," the ability's
controller has the option to apply the indicated
effect by executing the indicated process when
resolving the card or ability.
10.5. Confirmation Timing
10.5.1. Confirmation Timing refers to a point during
the game where rules handling occurs (11.1.2)
and automatic abilities are played.
10.5.1.1. During Confirmation Timing, first all
applicable rules handling processes are
resolved. Once those have been resolved,
automatic abilities whose trigger conditions
have been met are played and resolved. For
more information, see (10.5.2).
10.5.2. If Confirmation Timing occurs, the game
proceeds as follows:
10.5.2.1. All rules handling processes applicable at
this time are executed simultaneously. If this
results in more instances of rules handling,
repeat this step until no rules handling
processes remain.
10.5.2.2. If the active player controls any pending
automatic abilities, the player selects one of
them and plays and resolves it, and the game
returns to (10.5.2.1).
10.5.2.3. If the non-active player controls any
pending automatic abilities, the player selects
one of them and plays and resolves it, and the
game returns to (10.5.2.1).
10.5.2.4. Confirmation Timing ends.
10.6. Playing and Resolving
10.6.1. Activated abilities and automatic abilities, as
well as cards from hand, are resolved by being
played, whereupon they produce an effect.
Passive abilities are not played; they are
constantly producing an effect.
10.6.2. To play a card or ability, the player does the
following:
10.6.2.1. The player specifies the card or ability to
be played. If it's a card, they reveal it and move
it to the resolution zone.
10.6.2.1.1. If the card or ability cannot be
played—due to an issue with target selection
(10.6.2.3) or cost payment (10.6.2.5), for
example—then it cannot be specified.
10.6.2.1.2. If a card in the EX area is to be
played, and it has any effects applied to it,
those effects apply to it even after it moves to
the resolution zone.
10.6.2.2. If any selections must be made as a
prerequisite to play the card or ability (option
selections for a "choose" ability, for example),
the player makes those selections.
10.6.2.2.1. This includes whether or not to pay
optional additional costs.
10.6.2.3. If the card or ability requires the player to
select something other than a card in a non-
public zone (henceforth "target"), they make
that selection.
10.6.2.3.1. If the number of targets to be selected
is specified, the player must select as many
targets as they can to reach that number.
They cannot choose to not select a target
when there are targets that can be selected.
10.6.2.3.2. If the number of targets to be selected
is written in the form "up to [number]," the
player may select any number of targets
between zero and the specified number
(inclusive). If the number of targets is written
as "any number," the player may select any
number of targets equal to or greater than
zero.