cr:6.2.2a

A layer-continuous effect starts as soon it is generated and ends after a specified duration or when it is not longer applicable. A specified duration is fixed at the time the effect is generated and does not change once generated. If no duration is explicitly specified by the effect and the effect is not explicitly dependent on a condition, the effect ends at the end of the turn it was generated.

Example: Stasis Cell has the text “. . . activated abilities of target equipment can’t be activated until the end of its controller’s next turn.” which is a layer-continuous effect that has a duration until the end of the current controller’s next turn. If the controller of the equipment changes, the duration of the effect does not change.

Example: Chains of Eminence has the text “. . . name a card. The named card can’t be pitched, played, or defend while this is in the arena.” which is a layer-continuous effect that has a dependence on Chains of Eminence being in the arena. The effect will end only when Chains of Eminence is not in the arena.

Example: Tempest Aurora has the text “The next card you play this turn with cost 0 and an arcane damage effect, instead deals that much arcane damage plus 1.” which is a layer-continuous effect that has no explicit duration or dependence on a condition. If a player plays Tempest Aurora and Sigil of Aether, the the effect will only apply to the Sigil of Aether until the end of the current turn and will not affect its arcane damage in subsequent turns.