I've managed to get some feedback from demons twice. Once, when I tried to summon Amy using the balg forum simple evocation guide, candles acted unnaturally (they got snuffed out with awful screeching the moment I called Amy's name and again when I told my desire), and when I simply drew the sigil of Morax I got an intrusive thought that I need blood as an offering. However, no matter how many tries I tried to drew sigils or use balg method, nothing happened again both with them or with any other goetia demon (I've tried to interact with Leraje amd Paimon, at least). And the desire that I told Amy was never fulfilled. So my question is - how do I reliably make them answer me and more importantly, how do I make them do what I want? Do I really need to offer my blood after all? Or do I have to make those intricate circles that make no sense to me, get lions pelt and pentacle out of gold, etc, etc?