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454. Layers are applied in the following order:

454.1. Trait-Altering Effects

454.1.a. This layer deals with effects that grant, remove, or replace inherent traits of Game Objects. Name Super Type Type Tags Controller Cost Domain
454.1.a.1. Assignment of Might is dealt with in this layer. Example: A spell reads "A unit's Might becomes 4 this turn." The unit's Might is set to 4 in this layer.
454.1.b. One Game Object becoming a copy of another.
454.1.b.1. All Traits, including the Rules Text, replace or are added to those of the original Game Object as specified by the Game Effect directing the Copy. This is applied in this layer.
454.1.c. Effects for this layer can be identified by the phrase "become(s)", "give," "is," or "are" in the text. Example: A permanent has the ability "Other friendly units are Yordles." Other friendly units gain the Yordle tag in this layer.

454.2. Ability-Altering Effects

454.2.a. This layer deals with effects that grant, remove, or replace the abilities or rules text of Game Objects . Keywords Passive Abilities Appending rules text Removing rules text Duplicating Rules Text from one Game Object to another
454.2.b. Effects for this layer can be identified by the phrase "become(s)," "give," "lose(s)," "have," "has," "is," or "are" in the text. Example: A permanent has the ability "Other friendly units have [Vision]." Other friendly units gain the Vision keyword in this layer.
454.2.c. Abilities of Effect Text of Attached cards are appended in this layer.

454.3. Arithmetic

454.3.a. This layer deals with the mathematics of increasing and decreasing the numeric values of the traits of Game Objects. Might Energy Cost Power Cost
454.3.b. When an arithmetic effect has a limitation that applies, it is limited at the time of its application, and is “remembered” at that limited level for the duration of its effect. This process is called “snapshotting.” Example: If an effect gives a unit “-4 [M] to a min of 1 until end of turn” choosing a unit with 2 [M], then the effect will generate -1 [M] until end of turn.
454.3.c. Might Bonuses of Attached cards are applied in this layer.
454.3.d. This layer applies arithmetic in the following way.
454.3.d.1. Increases 454.3.d.1.a. Positive values, or increases, to Might are applied first. 454.3.d.1.b If there is a restriction or limitation to this increase, the limitation is “snapshotted” for the duration of the effect.
454.3.d.2. Decreases 454.3.d.2.a. Negative values, or decreases, to Might are applied last. 454.3.d.2.b. If there is a restriction or limitation to this decrease, the limitation is snapshotted for the duration of the effect.
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