- Looking for the normal versions of Prison Spiders or Creepers?
Creeders are hostile mobs in Minecraft: Story Mode. They are a hybrid of creepers and prison spiders, and they make their only appearance in "Jailhouse Block".
- Creeders are exclusive to Minecraft: Story Mode.
- Unlike the other spider variants, the creeders only have six legs rather than eight.
- Unlike normal creepers or charged creepers, the creeders are capable of exploding obsidian.
- This makes creeders the only mob in Minecraft: Story Mode that are capable of exploding obsidian.
- It was confirmed on Twitter by Telltale Games that these spider/prison creeper variants were in-fact called creeders. 
- ↑ http://twitter.com/telltalegames/status/911348340595376128
Jesse and Petra/Jack first encountering Creeders.