Rule 418.6
Deal actions can originate from one or more sources.
- 418.6.a If a game effect does not specify a source, the game effect describing the Deal action is the source. Example: Void…
- 418.6.b If a game effect does specify a source, then that source is what is considered the origin of the Damage for this Deal…
- 418.6.c Damage Dealt as a result of being assigned during Combat has the Units as its source.