How to Enter the Command
1
Open the Chat Window. The easiest way to run a command in Minecraft is within the chat window.
2
Type the Command. In this example, we are going to summon a fireball in Minecraft Java Edition (PC/Mac) 1.20 with the following command: /summon fireball ~ ~1 ~
they spawn within a certain radius of the spawner, which is within the bounding box of a nether fortress. But no, there does not have to be nether brick below them or the spawner for them to spawn. it depends whether you're playing java or bedrock.
