Collection Infection is the first episode of the second season of Mighty Magiswords, and the fifty-third episode overall. It premiered on Cartoon Network Australia on March 5, 2018 and in Southeast Asia on March 3, 2018 before airing in the US. It aired in the United States on April 30, 2018.
Having pared down their Magisword collection, the Warriors are forced into unconventional battle choices on a dangerous mission into the Deepest Darkest Woods.
- Prohyas Warrior
- Vambre Warrior
- Frostferatu's mother (mentioned only)
- Chicken Bear
- Tooth Fairy
- Snow Cone Magisword
- Pandachute Magisword
- Oogly Googly Eye Magisword
- Warm Hug Magisword
- Rain Cloud Magisword (Vambre, Prohyas; 3)
- Wad of Gum Magisword
- Needlessly Complicated Magisword
- Boulder Magisword
- Extendo Flick Magisword
- Birdcall Magisword
- Ground Pound Magisword
- Candy Magisword (debut) (Prohyas; 2)
- Pillow Magisword (Prohyas; 2)
- Radiator Magisword
- Pizza Magisword
- Underpants Magisword
- Mechanical Mole Magisword
- Pancake Magisword
- Big Bad Boot Magisword
- Baby Booty Magisword
- Muscly Arm Magisword (Vambre; 2)
- Toothbrush Magisword
- Meat Grinder Magisword
- Sticky Note Magisword
- Fuzzy Wuzzy Magisword
Super Teamwork Combo
- Cavity Cascade (Candy Magisword + Rain Cloud Magisword)
Starting this season, while the animation and designs remained unchanged, it became more fluid and expressive to the storyboards and timeline. The pacing has also been toned down to a degree. Creator Kyle Carrozza has mentioned that the second season episodes were much better and more of his favorites than the first, as the series is getting close to how he visions the series' animation to work the way he wanted. Also, the Super Teamwork Combos are now done in anime-esque action sequences. The end of each episode also features an anime-esque eyecatch showing the characters in chibi form compete with a 5-second 8-bit rendition of the show's theme song.
- This marks the first episode in the second season.
- The Chicken Bear is a reference to creator Kyle Carrozza aka TVsKyle's song "ChickenBear".
- Eyecatch: Füd shows Prohyas and Vambre her pie and the Warriors' spice it up with their Cinnamon Magisword.
- Starting this season, every Grup gag in each episode is individual.
- This is the first episode when Thieves and Pirates interacted each other.
- Ironically, Prohyas using Candy Magisword and Vambre reminded him that eating sweets will rotted his teeth, the Warriors could've just do the Super Teamwork Combo (Candy Magisword + Rain Cloud Magisword = Cavity Cascade) to make the fangs in the river rotting in the beginning instead of going through all the trouble choosing other magiswords.
<gallery> Behind the Magiswords Season 2! Collection Infection!-0 <gallery>