Historical Rules · 3 May 2019
Rule 702.126a
Official source text from the 3 May 2019 Rules release
Aftermath is an ability found on some split cards (see rule 708, “Split Cards”). It represents three static abilities. “Aftermath” means “You may cast this half of this split card from your graveyard,” “This half of this split card can’t be cast from any zone other than a graveyard,” and “If this spell was cast from a graveyard, exile it instead of putting it anywhere else any time it would leave the stack.”