All split cards have two card faces on a single card, and you put a split card onto the stack with only the half you're casting. The characteristics of the half you didn't cast are ignored while the spell is on the stack.
Indulge // Excess
Each split card has two names. If an effect instructs you to choose a card name, you may choose one, but not both.
Once you've started to cast a spell with aftermath from your graveyard, the card is immediately moved to the stack. Opponents can't try to stop the ability by exiling the card with another effect.
Magic: The Gathering · ™ & © Wizards of the Coast · Illus. Gaboleps
Card data via Scryfall. Rarix is fan-made; not endorsed by the rights holders.
