Book of Summons from Other Worlds

This is a game where you don't know where to start. The Book of Summoning is the source of power for all players. If the book is destroyed, everyone will die. You can use your mental power to summon creatures, props and magic. Come out, skeleton; come out, zombie; come out, bat; come out, golem; come out, death knight; come out, lich; come out, dead ghost; come out, reader... Something strange seems to have been mixed in?