"A Spell with No Name" is the second segment of the sixty-eighth episode of Star vs. the Forces of Evil. It premiered on April 14, 2019 alongside "Junkin' Janna", and is the second segment of the twelfth episode in the fourth season.
As Star's spells sit down to have pancakes, Eclipsa's spells suddenly burst in and begin to break everything in search of something. Nightmare Dream blasts Spider with a Top Hat, causing him to lose his confidence and the spells kidnap Glow Worm and leave. Star's spells are horrified and they proceed to push Richard the Narwhal to go and get him back. He meets up with Eclipsa's spells who all try to tell him to go back, but he refuses. He realizes that the room he stays in is actually connected to other rooms belonging to the previous queens of Mewni and their spells as well. They use Glow Worm to find "The Spell with No Name", a small deadly butterfly creature that destroys everything in its path. When they fail to capture it, it flies through Hypnoslumber, killing him instantly.
Eclipsa's spells give Glow Worm back to Richard and move onto plan B: detonating a bomb that will destroy the entire dimension. Richard is furious at the decision until he realizes that he has echo location and therefore can see the spell without the use of Glow Worm. He leads the other spells and manages to blast it straight at them and into a pickle jar, the only thing that can hold the nameless spell. Richard returns Glow Worm back to the other spells who happily return to eating pancakes. They offer Eclipsa's spells a chance to join them, but they turn them down. As they leave, Richard looks at the Spell with No Name in fear.
- Pamela Adlon as Ouroboros, Spell 1, Cupcake 2
- Maria Bamford as Makeup Blast, Void Cat, Tentacle Spell
- Eric Bauza as Billy, Rock, Pyro Pony, Narwhal, Warnicorn 2
- Dominic Bisignano as Minotaur, Dave the Flying Pig, Cupcake 1, Warnicorn 1
- Natasha Leggero as Nightmare Dream
- Steve Little as Spider with a Top Hat
- Ron Lynch as Richard the Narwhal
- Natalie Palamides as Snail
- Chris Redd as Hypnoslumber
- Kari Wahlgren as Glowworm, Octocorn, Spell 2
- The eyepatch-wearing Narwhal's name is revealed to be Richard.
- The dimension where Star and Eclipsa's spells live is revealed to have separate rooms for each queen's spells.
- The initial episode description inaccurately stated that the plot involved Star and Eclipsa accidentally firing a spell at each other that unleashes the titular spell and that they send the spells themselves on the mission to retrieve it. Neither Star, nor Eclipsa appear in the episode and the action is retained within the wand dimension.
- Every voice actor in this episode is listed under additional voices in the credits.
- June 28, 2019 (Southeast Asia)