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Magic: The Gathering Comprehensive Rules Changes

Masters Edition to Lorwyn (Single Change View)

General changes

Old rule (Masters Edition) New rule (Lorwyn)

404.4e.

The source of a delayed triggered ability created by a spell is that spell. The source of a delayed triggered ability created by another ability is the same as the source of that other ability. The controller of a delayed triggered ability is the same as the controller of the spell or ability that created it, even if that player no longer controls its source.