Botania Version: 198
Forge Version(s): 1231 & 1338
No Optifine

When you try to summon a Gaia Guardian with /summon Botania.botania:doppleganger X Y Z it will not summon. This is possibly because the Gaia Guardian must have a preset spawn position set to exist. (tested as cloning one would revert it to where it was originally created. I was going to attempt to create a version of the Gaia Guardian with a warded shield and potion effects (once I got the NBT data from Azanor on how to do that with Command Blocks). Logs probably wont help as it is with /summon as it is just 1 command....

Technic Log: http://pastebin.com/LsdbnuHV
Serverside Log: http://pasted.co/0d8e1178

First 3 pics are from server last 2 are SSP.

You also need to specify these tags so it knows where to check for players: https://github.com/Vazkii/Botania/blob/master/src/main/java/vazkii/botania/common/entity/EntityDoppleganger.java#L86-L88

Example please?

My apologies for commenting on such an old post, but how would one use these tags in a /summon command?

Check the vanilla wiki on how to summon entities with NBT, and specify the sourceX/Y/Z tags somewhere nearby

My apologies @williewillus, but I’m not sure exactly what nbt tags I should be applying in this situation.

/summon botania:doppleganger x y z {sourceX: x, sourceY: y, sourcesZ: z} (replacing x, y, z with where you want to spawn it)

note that this is not officially supported, and the guardian will spawn immediately with full health. You can also do other things that break the game such as spawning multiple at ones, do this at your own risk