To make either kind of portal in Minecraft — End or Nether — you'll need special items like obsidian or Eyes of Ender.

The resulting system — which Facebook says took it “under two years” to create from scratch — allows Portal to make decisions designed to improve the flow of a conversation.

If you want to make a Nether Portal or End Portal in Minecraft, you'll need to gather a lot of resources. Here's what to know about Portals in Minecraft.