The command summons a happy ghast, but with a negative age, essentially making the creature back to a ghastling. Furthermore, if you want to keep the mob as a ghastling for longer than 20 minutes, ...

Ghastling is a baby variant of the happy ghast mob in Minecraft. When you try to grow a happy ghast, the dried ghast block will first convert into a ghastling before growing into a happy ghast.

However, thanks to mods, this isn’t always the case, and some talented modders have managed to turn the Minecraft you know and love into a stellar RTS, and it’s well worth trying out. How to ...