Old Spirits

Anyone here has evoked the old spirits from Grimorium Imperium?I’ve heard that they’re complete bullshit and the spirits are made up,is that true?

Read ‘Necronomicon Gnosis’ and ‘Exploring the Unnamable’ from Asenath Mason. Both books offer pathworking through these entities and refer to that grimoire quite a bit. Asenath Mason used to be part of Dragon Rouge and this was a big focus of hers during that time.