|This article is about a/an monster in Mighty Morphin Alien Rangers.|
|"That's not enough to stop me."|
|―Arachnofiend's final words before her death[src]|
Lord Zedd transformed a spider from Billy's garage into Arachnofiend to ambush Cestro and Tideus when they returned to the garage after rehydrating. Arachnofiend took Billy and his phase modulator component for the crystal transformer invention to her lair in a cavern beneath Angel Grove, then trapped him and the device in webbing. Arachnofiend shot webbing from her hand at the Aquitian Rangers in her lair. She was destroyed by the Shogun Megazord.
Prior to Arachnofiend's debut, she was among the monsters seen as Master Vile's conference.
- She is the overall final monster of the Mighty Morphin Power Rangers series.
- She is one of the few Monsters of the Week in Power Rangers to have their own Lair