• Book of wisdom and fundamental guide designed for role-playing game masters (Guardians). • Compilation of practical tips ranging from table preparation to managing critical moments. • Includes narrative suggestions for effectively maintaining an atmosphere of tension and horror. • Offers tools and guidelines for designing own scenarios, structuring mysteries, and creating clues. • Versatile and applicable for both single-night games and long-term campaigns. • Recommended for ages 12 and up. • Edition entirely in Spanish.