Subrule · Chapter 1
cr:1.7.1a
The source of an ability is the card or token that has that ability. The source of an ability of an activated-layer or triggered-layer is the same as the source of the ability that created that layer. Activated-layers and triggered-layers exist independently of their source - if the source of an activated-layer or triggered-layer ceases to exist, it does not prevent the resolution of that layer.