Some cards create a continuous effect that sets the name of an object. This changes the text that represents the object’s name. That object loses any names it had and has only the specified name.
April 22, 2021 · Strixhaven
A splice ability changes a spell’s text by adding the rules text of the card with splice to the spell, following that spell’s own rules text. It doesn’t modify or replace any of that spell’s own text. (See rule 702.47, “Splice.”)
June 14, 2019 · Modern Horizons
A splice ability changes a spell’s text by adding the rules text of the card with splice to the spell, following that spell’s own rules text. It doesn’t modify or replace any of that spell’s own text. (See rule 702.46, “Splice.”)