Professor Socalda

We won't simple summon a demon. firstly we summon an imp, this one will become a sacrifice for a stronger demon (Cuts the small imp open, exposing it's still beating heart and sacrificing it to summon a stronger demon). the stronger the wanted demon should be the more sacrifices you need, her quantity beats quality so it's more effective to summon a few hundreds of imps and sacrifice these instead of human as sacrifice. now it's your turn, summon a imp and use it as sacrifice.