MCStacker on Twitter: "You can import summon, entitydata, give, setblock & fill commands into https://t.co/chyigrXka9 .Read about it here: https://t.co/rweZTVZV0Z https://t.co/RTghBrhCBm" / Twitter
Tutorials/Command blocks and functions – Minecraft Wiki
Summon mob command generator 0.4 released : r/MinecraftCommands