Question: I know that in a previous version of Minecraft, you could get a Ender Dragon spawn egg (a white egg, like it has no texture). Is that still possible, and if how do i get it?

Answer: 
There is an update now which allows you to spawn it. Just simply use the command

```
/summon EnderDragon

```

That's all. Hope I helped
As of 1.19.3, you can now obtain them with the `/give` command.